diff --git a/changelogs/unreleased/65660-update-karma-to-4-2-0.yml b/changelogs/unreleased/65660-update-karma-to-4-2-0.yml
new file mode 100644
index 0000000000000000000000000000000000000000..c0cb40ce169fba927d9dcd3e26f820a32b46b056
--- /dev/null
+++ b/changelogs/unreleased/65660-update-karma-to-4-2-0.yml
@@ -0,0 +1,5 @@
+---
+title: Update karma to 4.2.0
+merge_request: 31495
+author: Takuya Noguchi
+type: other
diff --git a/package.json b/package.json
index 4ff99f29e24e7e61b3e42252c88641bb1511622f..c368cf7c8e429a7709a32494516424df2898e828 100644
--- a/package.json
+++ b/package.json
@@ -176,14 +176,14 @@
     "jest-util": "^24.0.0",
     "jsdoc": "^3.5.5",
     "jsdoc-vue": "^1.0.0",
-    "karma": "^3.0.0",
-    "karma-chrome-launcher": "^2.2.0",
-    "karma-coverage-istanbul-reporter": "^2.0.4",
+    "karma": "^4.2.0",
+    "karma-chrome-launcher": "^3.0.0",
+    "karma-coverage-istanbul-reporter": "^2.1.0",
     "karma-jasmine": "^1.1.2",
     "karma-junit-reporter": "^1.2.0",
     "karma-mocha-reporter": "^2.2.5",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^4.0.0-beta.0",
+    "karma-webpack": "^4.0.2",
     "md5": "^2.2.1",
     "node-sass": "^4.12.0",
     "nodemon": "^1.18.9",
diff --git a/yarn.lock b/yarn.lock
index acf1a4d86528b543444805cae194e2623e5cbedb..b35f23c279118ecdf495b1bacd3cd983245722c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1687,6 +1687,14 @@ anymatch@^2.0.0:
     micromatch "^3.1.4"
     normalize-path "^2.1.1"
 
+anymatch@^3.0.1:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-3.0.3.tgz#2fb624fe0e84bccab00afee3d0006ed310f22f09"
+  integrity sha512-c6IvoeBECQlMVuYUjSwimnhmztImpErfxJzWZhIQinIvQWoGOnB0dLIgifbPHQt5heS6mNlaZG16f06H3C8t1g==
+  dependencies:
+    normalize-path "^3.0.0"
+    picomatch "^2.0.4"
+
 apollo-cache-inmemory@^1.5.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/apollo-cache-inmemory/-/apollo-cache-inmemory-1.5.1.tgz#265d1ee67b0bf0aca9c37629d410bfae44e62953"
@@ -1857,11 +1865,6 @@ array-flatten@^2.1.0:
   resolved "https://registry.yarnpkg.com/array-flatten/-/array-flatten-2.1.1.tgz#426bb9da84090c1838d812c8150af20a8331e296"
   integrity sha1-Qmu52oQJDBg42BLIFQryCoMx4pY=
 
-array-slice@^0.2.3:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/array-slice/-/array-slice-0.2.3.tgz#dd3cfb80ed7973a75117cdac69b0b99ec86186f5"
-  integrity sha1-3Tz7gO15c6dRF82sabC5nshhhvU=
-
 array-union@^1.0.1, array-union@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
@@ -1874,11 +1877,6 @@ array-uniq@^1.0.1, array-uniq@^1.0.2:
   resolved "https://registry.yarnpkg.com/array-uniq/-/array-uniq-1.0.3.tgz#af6ac877a25cc7f74e058894753858dfdb24fdb6"
   integrity sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=
 
-array-unique@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.2.1.tgz#a1d97ccafcbc2625cc70fadceb36a50c58b01a53"
-  integrity sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=
-
 array-unique@^0.3.2:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.3.2.tgz#a894b75d4bc4f6cd679ef3244a9fd8f46ae2d428"
@@ -1952,12 +1950,12 @@ async@^1.5.2:
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
   integrity sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=
 
-async@^2.0.0, async@^2.6.1:
-  version "2.6.2"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.2.tgz#18330ea7e6e313887f5d2f2a904bac6fe4dd5381"
-  integrity sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==
+async@^2.6.2:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
+  integrity sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==
   dependencies:
-    lodash "^4.17.11"
+    lodash "^4.17.14"
 
 asynckit@^0.4.0:
   version "0.4.0"
@@ -2189,6 +2187,11 @@ binary-extensions@^1.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.11.0.tgz#46aa1751fb6a2f93ee5e689bb1087d4b14c6c205"
   integrity sha1-RqoXUftqL5PuXmibsQh9SxTGwgU=
 
+binary-extensions@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.0.0.tgz#23c0df14f6a88077f5f986c0d167ec03c3d5537c"
+  integrity sha512-Phlt0plgpIIBOGTT/ehfFnbNlfsDEiqmzE2KRXoX1bLIlir4X/MR+zSyBEkL05ffWgnRSf/DXv+WrUAVr93/ow==
+
 binaryextensions@2:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/binaryextensions/-/binaryextensions-2.1.1.tgz#3209a51ca4a4ad541a3b8d3d6a6d5b83a2485935"
@@ -2291,13 +2294,6 @@ brace-expansion@^1.1.7, brace-expansion@^1.1.8:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-braces@^0.1.2:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/braces/-/braces-0.1.5.tgz#c085711085291d8b75fdd74eab0f8597280711e6"
-  integrity sha1-wIVxEIUpHYt1/ddOqw+FlygHEeY=
-  dependencies:
-    expand-range "^0.1.0"
-
 braces@^2.3.0, braces@^2.3.1:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.2.tgz#5979fd3f14cd531565e5fa2df1abfff1dfaee729"
@@ -2314,7 +2310,7 @@ braces@^2.3.0, braces@^2.3.1:
     split-string "^3.0.2"
     to-regex "^3.0.1"
 
-braces@^3.0.1:
+braces@^3.0.1, braces@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.2.tgz#3454e1a462ee8d599e236df336cd9ea4f8afe107"
   integrity sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==
@@ -2735,7 +2731,7 @@ check-types@^7.3.0:
   resolved "https://registry.yarnpkg.com/check-types/-/check-types-7.3.0.tgz#468f571a4435c24248f5fd0cb0e8d87c3c341e7d"
   integrity sha1-Ro9XGkQ1wkJI9f0MsOjYfDw0Hn0=
 
-chokidar@^2.0.0, chokidar@^2.0.2, chokidar@^2.0.3, chokidar@^2.0.4:
+chokidar@^2.0.0, chokidar@^2.0.2, chokidar@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.0.4.tgz#356ff4e2b0e8e43e322d18a372460bbcf3accd26"
   integrity sha512-z9n7yt9rOvIJrMhvDtDictKrkFHeihkNl6uWMmZlmL6tJtX9Cs+87oK+teBx+JIgzvbX3yZHT3eF8vpbDxHJXQ==
@@ -2755,6 +2751,21 @@ chokidar@^2.0.0, chokidar@^2.0.2, chokidar@^2.0.3, chokidar@^2.0.4:
   optionalDependencies:
     fsevents "^1.2.2"
 
+chokidar@^3.0.0:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.0.2.tgz#0d1cd6d04eb2df0327446188cd13736a3367d681"
+  integrity sha512-c4PR2egjNjI1um6bamCQ6bUNPDiyofNQruHvKgHQ4gDUP/ITSVSzNsiI5OWtHOsX323i5ha/kk4YmOZ1Ktg7KA==
+  dependencies:
+    anymatch "^3.0.1"
+    braces "^3.0.2"
+    glob-parent "^5.0.0"
+    is-binary-path "^2.1.0"
+    is-glob "^4.0.1"
+    normalize-path "^3.0.0"
+    readdirp "^3.1.1"
+  optionalDependencies:
+    fsevents "^2.0.6"
+
 chownr@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.1.tgz#54726b8b8fff4df053c42187e801fb4412df1494"
@@ -2790,11 +2801,6 @@ circular-json@^0.3.1:
   resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.3.tgz#815c99ea84f6809529d2f45791bdf82711352d66"
   integrity sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==
 
-circular-json@^0.5.5:
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.5.5.tgz#64182ef359042d37cd8e767fc9de878b1e9447d3"
-  integrity sha512-13YaR6kiz0kBNmIVM87Io8Hp7bWOo4r61vkEANy8iH9R9bc6avud/1FT0SBpqR1RpIQADOh/Q+yHZDA1iL6ysA==
-
 class-utils@^0.3.5:
   version "0.3.6"
   resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
@@ -2866,6 +2872,15 @@ clone-buffer@^1.0.0:
   resolved "https://registry.yarnpkg.com/clone-buffer/-/clone-buffer-1.0.0.tgz#e3e25b207ac4e701af721e2cb5a16792cac3dc58"
   integrity sha1-4+JbIHrE5wGvch4staFnksrD3Fg=
 
+clone-deep@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/clone-deep/-/clone-deep-4.0.1.tgz#c19fd9bdbbf85942b4fd979c84dcf7d5f07c2387"
+  integrity sha512-neHB9xuzh/wk0dIHweyAXv2aPGZIVk3pLMe+/RNzINf17fe0OG96QroktYAUm7SM1PBnzTabaLboqqxDyMU+SQ==
+  dependencies:
+    is-plain-object "^2.0.4"
+    kind-of "^6.0.2"
+    shallow-clone "^3.0.0"
+
 clone-regexp@^2.1.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/clone-regexp/-/clone-regexp-2.2.0.tgz#7d65e00885cd8796405c35a737e7a86b7429e36f"
@@ -2968,13 +2983,6 @@ colors@^1.1.0:
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.3.3.tgz#39e005d546afe01e01f9c4ca8fa50f686a01205d"
   integrity sha512-mmGt/1pZqYRjMxB1axhTo16/snVZ5krrKkcmMeVKxzECMMXoCgnvTPp10QgHfcbQZw8Dq2jMNG6je4JlWU0gWg==
 
-combine-lists@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/combine-lists/-/combine-lists-1.0.1.tgz#458c07e09e0d900fc28b70a3fec2dacd1d2cb7f6"
-  integrity sha1-RYwH4J4NkA/Ci3Cj/sLazR0st/Y=
-  dependencies:
-    lodash "^4.5.0"
-
 combined-stream@^1.0.6, combined-stream@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.7.tgz#2d1d24317afb8abe95d6d2c0b07b57813539d828"
@@ -3002,10 +3010,10 @@ commondir@^1.0.1:
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
   integrity sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=
 
-compare-versions@^3.2.1:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/compare-versions/-/compare-versions-3.4.0.tgz#e0747df5c9cb7f054d6d3dc3e1dbc444f9e92b26"
-  integrity sha512-tK69D7oNXXqUW3ZNo/z7NXTEz22TCF0pTE+YF9cxvaAM9XnkLo1fV621xCLrRR6aevJlKxExkss0vWqUCUpqdg==
+compare-versions@^3.4.0:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/compare-versions/-/compare-versions-3.5.1.tgz#26e1f5cf0d48a77eced5046b9f67b6b61075a393"
+  integrity sha512-9fGPIB7C6AyM18CJJBHt5EnCZDG3oiTJYy0NjfIAGjKpzv0tkxWko7TNQHF5ymqm7IH03tqmeuBxtvD+Izh6mg==
 
 component-bind@1.0.0:
   version "1.0.0"
@@ -3235,16 +3243,16 @@ core-js-pure@3.1.4:
   resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.1.4.tgz#5fa17dc77002a169a3566cc48dc774d2e13e3769"
   integrity sha512-uJ4Z7iPNwiu1foygbcZYJsJs1jiXrTTCvxfLDXNhI/I+NHbSIEyr548y4fcsCEyWY0XgfAG/qqaunJ1SThHenA==
 
-core-js@^2.2.0, core-js@~2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.3.0.tgz#fab83fbb0b2d8dc85fa636c4b9d34c75420c6d65"
-  integrity sha1-+rg/uwstjchfpjbEudNMdUIMbWU=
-
 core-js@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.1.3.tgz#95700bca5f248f5f78c0ec63e784eca663ec4138"
   integrity sha512-PWZ+ZfuaKf178BIAg+CRsljwjIMRV8MY00CbZczkR6Zk5LfkSkjGoaab3+bqRQWVITNZxQB7TFYz+CFcyuamvA==
 
+core-js@~2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.3.0.tgz#fab83fbb0b2d8dc85fa636c4b9d34c75420c6d65"
+  integrity sha1-+rg/uwstjchfpjbEudNMdUIMbWU=
+
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -3799,10 +3807,10 @@ data-urls@^1.0.0:
     whatwg-mimetype "^2.2.0"
     whatwg-url "^7.0.0"
 
-date-format@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/date-format/-/date-format-1.2.0.tgz#615e828e233dd1ab9bb9ae0950e0ceccfa6ecad8"
-  integrity sha1-YV6CjiM90aubua4JUODOzPpuytg=
+date-format@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/date-format/-/date-format-2.1.0.tgz#31d5b5ea211cf5fd764cd38baf9d033df7e125cf"
+  integrity sha512-bYQuGLeFxhkxNOF3rcMtiZxvCBAquGzZm6oWA1oZ0g2THUzivaRhv8uOhdr19LmoobSOLoIAxeUK2RdbM8IFTA==
 
 date-now@^0.1.4:
   version "0.1.4"
@@ -4862,15 +4870,6 @@ exit@^0.1.2:
   resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
   integrity sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=
 
-expand-braces@^0.1.1:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/expand-braces/-/expand-braces-0.1.2.tgz#488b1d1d2451cb3d3a6b192cfc030f44c5855fea"
-  integrity sha1-SIsdHSRRyz06axks/AMPRMWFX+o=
-  dependencies:
-    array-slice "^0.2.3"
-    array-unique "^0.2.1"
-    braces "^0.1.2"
-
 expand-brackets@^2.1.4:
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-2.1.4.tgz#b77735e315ce30f6b6eff0f83b04151a22449622"
@@ -4884,14 +4883,6 @@ expand-brackets@^2.1.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.1"
 
-expand-range@^0.1.0:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/expand-range/-/expand-range-0.1.1.tgz#4cb8eda0993ca56fa4f41fc42f3cbb4ccadff044"
-  integrity sha1-TLjtoJk8pW+k9B/ELzy7TMrf8EQ=
-  dependencies:
-    is-number "^0.1.1"
-    repeat-string "^0.2.2"
-
 expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/expand-tilde/-/expand-tilde-2.0.2.tgz#97e801aa052df02454de46b02bf621642cdc8502"
@@ -5315,12 +5306,14 @@ from2@^2.1.0, from2@^2.1.1:
     inherits "^2.0.1"
     readable-stream "^2.0.0"
 
-fs-access@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/fs-access/-/fs-access-1.0.1.tgz#d6a87f262271cefebec30c553407fb995da8777a"
-  integrity sha1-1qh/JiJxzv6+wwxVNAf7mV2od3o=
+fs-extra@^7.0.1:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-7.0.1.tgz#4f189c44aa123b895f722804f55ea23eadc348e9"
+  integrity sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==
   dependencies:
-    null-check "^1.0.0"
+    graceful-fs "^4.1.2"
+    jsonfile "^4.0.0"
+    universalify "^0.1.0"
 
 fs-minipass@^1.2.5:
   version "1.2.6"
@@ -5360,6 +5353,11 @@ fsevents@^1.2.2, fsevents@^1.2.7:
     nan "^2.12.1"
     node-pre-gyp "^0.12.0"
 
+fsevents@^2.0.6:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.0.7.tgz#382c9b443c6cbac4c57187cdda23aa3bf1ccfc2a"
+  integrity sha512-a7YT0SV3RB+DjYcppwVDLtn13UQnmg0SWZS7ezZD0UjnLwXmy8Zm21GMVGLaFGimIqcvyMQaOJBrop8MyOp1kQ==
+
 fstream@^1.0.0, fstream@^1.0.12:
   version "1.0.12"
   resolved "https://registry.yarnpkg.com/fstream/-/fstream-1.0.12.tgz#4e8ba8ee2d48be4f7d0de505455548eae5932045"
@@ -5514,6 +5512,13 @@ glob-parent@^3.1.0:
     is-glob "^3.1.0"
     path-dirname "^1.0.0"
 
+glob-parent@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.0.0.tgz#1dc99f0f39b006d3e92c2c284068382f0c20e954"
+  integrity sha512-Z2RwiujPRGluePM6j699ktJYxmPpJKCfpGA13jz2hmFZC7gKetzrWvg5KN3+OsIFmydGyZ1AVwERCq1w/ZZwRg==
+  dependencies:
+    is-glob "^4.0.1"
+
 glob-stream@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/glob-stream/-/glob-stream-6.1.0.tgz#7045c99413b3eb94888d83ab46d0b404cc7bdde4"
@@ -6382,6 +6387,13 @@ is-binary-path@^1.0.0:
   dependencies:
     binary-extensions "^1.0.0"
 
+is-binary-path@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-2.1.0.tgz#ea1f7f3b80f064236e83470f86c09c254fb45b09"
+  integrity sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw==
+  dependencies:
+    binary-extensions "^2.0.0"
+
 is-buffer@^1.1.4, is-buffer@^1.1.5, is-buffer@~1.1.1:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
@@ -6541,11 +6553,6 @@ is-npm@^1.0.0:
   resolved "https://registry.yarnpkg.com/is-npm/-/is-npm-1.0.0.tgz#f2fb63a65e4905b406c86072765a1a4dc793b9f4"
   integrity sha1-8vtjpl5JBbQGyGBydloaTceTufQ=
 
-is-number@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/is-number/-/is-number-0.1.1.tgz#69a7af116963d47206ec9bd9b48a14216f1e3806"
-  integrity sha1-aaevEWlj1HIG7JvZtIoUIW8eOAY=
-
 is-number@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/is-number/-/is-number-3.0.0.tgz#24fd6201a4782cf50561c810276afc7d12d71195"
@@ -6741,38 +6748,38 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
-istanbul-api@^2.0.5:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/istanbul-api/-/istanbul-api-2.1.1.tgz#194b773f6d9cbc99a9258446848b0f988951c4d0"
-  integrity sha512-kVmYrehiwyeBAk/wE71tW6emzLiHGjYIiDrc8sfyty4F8M02/lrgXSm+R1kXysmF20zArvmZXjlE/mg24TVPJw==
+istanbul-api@^2.1.6:
+  version "2.1.6"
+  resolved "https://registry.yarnpkg.com/istanbul-api/-/istanbul-api-2.1.6.tgz#d61702a9d1c66ad89d92e66d401e16b0bda4a35f"
+  integrity sha512-x0Eicp6KsShG1k1rMgBAi/1GgY7kFGEBwQpw3PXGEmu+rBcBNhqU8g2DgY9mlepAsLPzrzrbqSgCGANnki4POA==
   dependencies:
-    async "^2.6.1"
-    compare-versions "^3.2.1"
+    async "^2.6.2"
+    compare-versions "^3.4.0"
     fileset "^2.0.3"
-    istanbul-lib-coverage "^2.0.3"
-    istanbul-lib-hook "^2.0.3"
-    istanbul-lib-instrument "^3.1.0"
-    istanbul-lib-report "^2.0.4"
-    istanbul-lib-source-maps "^3.0.2"
-    istanbul-reports "^2.1.1"
-    js-yaml "^3.12.0"
-    make-dir "^1.3.0"
+    istanbul-lib-coverage "^2.0.5"
+    istanbul-lib-hook "^2.0.7"
+    istanbul-lib-instrument "^3.3.0"
+    istanbul-lib-report "^2.0.8"
+    istanbul-lib-source-maps "^3.0.6"
+    istanbul-reports "^2.2.4"
+    js-yaml "^3.13.1"
+    make-dir "^2.1.0"
     minimatch "^3.0.4"
     once "^1.4.0"
 
-istanbul-lib-coverage@^2.0.2, istanbul-lib-coverage@^2.0.3, istanbul-lib-coverage@^2.0.5:
+istanbul-lib-coverage@^2.0.2, istanbul-lib-coverage@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.5.tgz#675f0ab69503fad4b1d849f736baaca803344f49"
   integrity sha512-8aXznuEPCJvGnMSRft4udDRDtb1V3pkQkMMI5LI+6HuQz5oQ4J2UFn1H82raA3qJtyOLkkwVqICBQkjnGtn5mA==
 
-istanbul-lib-hook@^2.0.3:
+istanbul-lib-hook@^2.0.7:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/istanbul-lib-hook/-/istanbul-lib-hook-2.0.7.tgz#c95695f383d4f8f60df1f04252a9550e15b5b133"
   integrity sha512-vrRztU9VRRFDyC+aklfLoeXyNdTfga2EI3udDGn4cZ6fpSXpHLV9X6CHvfoMCPtggg8zvDDmC4b9xfu0z6/llA==
   dependencies:
     append-transform "^1.0.0"
 
-istanbul-lib-instrument@^3.0.0, istanbul-lib-instrument@^3.0.1, istanbul-lib-instrument@^3.1.0:
+istanbul-lib-instrument@^3.0.0, istanbul-lib-instrument@^3.0.1, istanbul-lib-instrument@^3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-3.3.0.tgz#a5f63d91f0bbc0c3e479ef4c5de027335ec6d630"
   integrity sha512-5nnIN4vo5xQZHdXno/YDXJ0G+I3dAm4XgzfSVTPLQpj/zAV2dV6Juy0yaf10/zrJOJeHoN3fraFe+XRq2bFVZA==
@@ -6785,7 +6792,7 @@ istanbul-lib-instrument@^3.0.0, istanbul-lib-instrument@^3.0.1, istanbul-lib-ins
     istanbul-lib-coverage "^2.0.5"
     semver "^6.0.0"
 
-istanbul-lib-report@^2.0.4:
+istanbul-lib-report@^2.0.4, istanbul-lib-report@^2.0.8:
   version "2.0.8"
   resolved "https://registry.yarnpkg.com/istanbul-lib-report/-/istanbul-lib-report-2.0.8.tgz#5a8113cd746d43c4889eba36ab10e7d50c9b4f33"
   integrity sha512-fHBeG573EIihhAblwgxrSenp0Dby6tJMFR/HvlerBsrCTD5bkUuoNtn3gVh29ZCS824cGGBPn7Sg7cNk+2xUsQ==
@@ -6794,7 +6801,7 @@ istanbul-lib-report@^2.0.4:
     make-dir "^2.1.0"
     supports-color "^6.1.0"
 
-istanbul-lib-source-maps@^3.0.1, istanbul-lib-source-maps@^3.0.2:
+istanbul-lib-source-maps@^3.0.1, istanbul-lib-source-maps@^3.0.6:
   version "3.0.6"
   resolved "https://registry.yarnpkg.com/istanbul-lib-source-maps/-/istanbul-lib-source-maps-3.0.6.tgz#284997c48211752ec486253da97e3879defba8c8"
   integrity sha512-R47KzMtDJH6X4/YW9XTx+jrLnZnscW4VpNN+1PViSYTejLVPWv7oov+Duf8YQSPyVRUvueQqz1TcsC6mooZTXw==
@@ -6805,7 +6812,7 @@ istanbul-lib-source-maps@^3.0.1, istanbul-lib-source-maps@^3.0.2:
     rimraf "^2.6.3"
     source-map "^0.6.1"
 
-istanbul-reports@^2.1.1:
+istanbul-reports@^2.1.1, istanbul-reports@^2.2.4:
   version "2.2.6"
   resolved "https://registry.yarnpkg.com/istanbul-reports/-/istanbul-reports-2.2.6.tgz#7b4f2660d82b29303a8fe6091f8ca4bf058da1af"
   integrity sha512-SKi4rnMyLBKe0Jy2uUdx28h8oG7ph2PPuQPvIAh31d+Ci+lSiEu4C+h3oBPuJ9+mPKhOyW0M8gY4U5NM1WLeXA==
@@ -7415,6 +7422,13 @@ json5@^1.0.1:
   dependencies:
     minimist "^1.2.0"
 
+jsonfile@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-4.0.0.tgz#8771aae0799b64076b76640fca058f9c10e33ecb"
+  integrity sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
 jsonparse@^1.2.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/jsonparse/-/jsonparse-1.3.1.tgz#3f4dae4a91fac315f71062f8521cc239f1366280"
@@ -7446,20 +7460,19 @@ jszip@^3.1.3:
     pako "~1.0.2"
     readable-stream "~2.0.6"
 
-karma-chrome-launcher@^2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/karma-chrome-launcher/-/karma-chrome-launcher-2.2.0.tgz#cf1b9d07136cc18fe239327d24654c3dbc368acf"
-  integrity sha512-uf/ZVpAabDBPvdPdveyk1EPgbnloPvFFGgmRhYLTDH7gEB4nZdSBk8yTU47w1g/drLSx5uMOkjKk7IWKfWg/+w==
+karma-chrome-launcher@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/karma-chrome-launcher/-/karma-chrome-launcher-3.0.0.tgz#5c3a7f877a304e90781c28fcd9a49e334a890f42"
+  integrity sha512-u/PnVgDOP97AUe/gJeABlC6Wa6aQ83MZsm0JgsJQ5bGQ9XcXON/7b2aRhl59A62Zom+q3PFveBkczc7E1RT7TA==
   dependencies:
-    fs-access "^1.0.0"
     which "^1.2.1"
 
-karma-coverage-istanbul-reporter@^2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/karma-coverage-istanbul-reporter/-/karma-coverage-istanbul-reporter-2.0.4.tgz#402ae4ed6eadb9d9dafbd408ffda17897c0d003a"
-  integrity sha512-xJS7QSQIVU6VK9HuJ/ieE5yynxKhjCCkd96NLY/BX/HXsx0CskU9JJiMQbd4cHALiddMwI4OWh1IIzeWrsavJw==
+karma-coverage-istanbul-reporter@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/karma-coverage-istanbul-reporter/-/karma-coverage-istanbul-reporter-2.1.0.tgz#5f1bcc13c5e14ee1d91821ee8946861674f54c75"
+  integrity sha512-UH0mXPJFJyK5uiK7EkwGtQ8f30lCBAfqRResnZ4pzLJ04SOp4SPlYkmwbbZ6iVJ6sQFVzlDUXlntBEsLRdgZpg==
   dependencies:
-    istanbul-api "^2.0.5"
+    istanbul-api "^2.1.6"
     minimatch "^3.0.4"
 
 karma-jasmine@^1.1.2:
@@ -7491,38 +7504,39 @@ karma-sourcemap-loader@^0.3.7:
   dependencies:
     graceful-fs "^4.1.2"
 
-karma-webpack@^4.0.0-beta.0:
-  version "4.0.0-rc.2"
-  resolved "https://registry.yarnpkg.com/karma-webpack/-/karma-webpack-4.0.0-rc.2.tgz#4c194e94789842af7f0ffa0de77ee7715739c7c1"
-  integrity sha512-Wuiq/xFBsbJMsHhYy5SYXxSp7Q0b8uzAG8+Siuo56ntoi5GluPE5LK3Mzl2UtD4k1leFwL6IeIE6Q+tk4F6k9Q==
+karma-webpack@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/karma-webpack/-/karma-webpack-4.0.2.tgz#23219bd95bdda853e3073d3874d34447c77bced0"
+  integrity sha512-970/okAsdUOmiMOCY8sb17A2I8neS25Ad9uhyK3GHgmRSIFJbDcNEFE8dqqUhNe9OHiCC9k3DMrSmtd/0ymP1A==
   dependencies:
-    async "^2.0.0"
+    clone-deep "^4.0.1"
     loader-utils "^1.1.0"
-    lodash "^4.17.10"
-    source-map "^0.5.6"
-    webpack-dev-middleware "^3.2.0"
+    neo-async "^2.6.1"
+    schema-utils "^1.0.0"
+    source-map "^0.7.3"
+    webpack-dev-middleware "^3.7.0"
 
-karma@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-3.0.0.tgz#6da83461a8a28d8224575c3b5b874e271b4730c3"
-  integrity sha512-ZTjyuDXVXhXsvJ1E4CnZzbCjSxD6sEdzEsFYogLuZM0yqvg/mgz+O+R1jb0J7uAQeuzdY8kJgx6hSNXLwFuHIQ==
+karma@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-4.2.0.tgz#27e88b310cde090d016980ff5444e3a239196fca"
+  integrity sha512-fmCuxN1rwJxTdZfOXK5LjlmS4Ana/OvzNMpkyLL/TLE8hmgSkpVpMYQ7RTVa8TNKRVQDZNl5W1oF5cfKfgIMlA==
   dependencies:
     bluebird "^3.3.0"
     body-parser "^1.16.1"
-    chokidar "^2.0.3"
+    braces "^3.0.2"
+    chokidar "^3.0.0"
     colors "^1.1.0"
-    combine-lists "^1.0.0"
     connect "^3.6.0"
-    core-js "^2.2.0"
+    core-js "^3.1.3"
     di "^0.0.1"
     dom-serialize "^2.2.0"
-    expand-braces "^0.1.1"
+    flatted "^2.0.0"
     glob "^7.1.1"
     graceful-fs "^4.1.2"
     http-proxy "^1.13.0"
     isbinaryfile "^3.0.0"
-    lodash "^4.17.4"
-    log4js "^3.0.0"
+    lodash "^4.17.11"
+    log4js "^4.0.0"
     mime "^2.3.1"
     minimatch "^3.0.2"
     optimist "^0.6.1"
@@ -7533,7 +7547,7 @@ karma@^3.0.0:
     socket.io "2.1.1"
     source-map "^0.6.1"
     tmp "0.0.33"
-    useragent "2.2.1"
+    useragent "2.3.0"
 
 katex@^0.10.0:
   version "0.10.0"
@@ -7788,7 +7802,7 @@ lodash.upperfirst@4.3.1:
   resolved "https://registry.yarnpkg.com/lodash.upperfirst/-/lodash.upperfirst-4.3.1.tgz#1365edf431480481ef0d1c68957a5ed99d49f7ce"
   integrity sha1-E2Xt9DFIBIHvDRxolXpe2Z1J984=
 
-lodash@^4.0.0, lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.5.0, lodash@~4.17.10:
+lodash@^4.0.0, lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.4, lodash@^4.17.5, lodash@~4.17.10:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
   integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
@@ -7807,16 +7821,16 @@ log-symbols@^3.0.0:
   dependencies:
     chalk "^2.4.2"
 
-log4js@^3.0.0:
-  version "3.0.5"
-  resolved "https://registry.yarnpkg.com/log4js/-/log4js-3.0.5.tgz#b80146bfebad68b430d4f3569556d8a6edfef303"
-  integrity sha512-IX5c3G/7fuTtdr0JjOT2OIR12aTESVhsH6cEsijloYwKgcPRlO6DgOU72v0UFhWcoV1HN6+M3dwT89qVPLXm0w==
+log4js@^4.0.0:
+  version "4.5.1"
+  resolved "https://registry.yarnpkg.com/log4js/-/log4js-4.5.1.tgz#e543625e97d9e6f3e6e7c9fc196dd6ab2cae30b5"
+  integrity sha512-EEEgFcE9bLgaYUKuozyFfytQM2wDHtXn4tAN41pkaxpNjAykv11GVdeI4tHtmPWW4Xrgh9R/2d7XYghDVjbKKw==
   dependencies:
-    circular-json "^0.5.5"
-    date-format "^1.2.0"
-    debug "^3.1.0"
-    rfdc "^1.1.2"
-    streamroller "0.7.0"
+    date-format "^2.0.0"
+    debug "^4.1.1"
+    flatted "^2.0.0"
+    rfdc "^1.1.4"
+    streamroller "^1.0.6"
 
 loglevel@^1.4.1:
   version "1.4.1"
@@ -7861,15 +7875,10 @@ lowlight@^1.11.0:
     fault "^1.0.2"
     highlight.js "~9.13.0"
 
-lru-cache@2.2.x:
-  version "2.2.4"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.2.4.tgz#6c658619becf14031d0d0b594b16042ce4dc063d"
-  integrity sha1-bGWGGb7PFAMdDQtZSxYELOTcBj0=
-
-lru-cache@^4.0.1, lru-cache@^4.1.2, lru-cache@^4.1.3:
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.3.tgz#a1175cf3496dfc8436c156c334b4955992bce69c"
-  integrity sha512-fFEhvcgzuIoJVUF8fYr5KR0YqxD238zgObTps31YdADwPPAp82a4M8TrckkWyx7ekNlf9aBcVn81cFwwXngrJA==
+lru-cache@4.1.x, lru-cache@^4.0.1, lru-cache@^4.1.2, lru-cache@^4.1.3:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.5.tgz#8bbe50ea85bed59bc9e33dcab8235ee9bcf443cd"
+  integrity sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==
   dependencies:
     pseudomap "^1.0.2"
     yallist "^2.1.2"
@@ -7886,7 +7895,7 @@ lz-string@^1.4.4:
   resolved "https://registry.yarnpkg.com/lz-string/-/lz-string-1.4.4.tgz#c0d8eaf36059f705796e1e344811cf4c498d3a26"
   integrity sha1-wNjq82BZ9wV5bh40SBHPTEmNOiY=
 
-make-dir@^1.0.0, make-dir@^1.3.0:
+make-dir@^1.0.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.3.0.tgz#79c1033b80515bd6d24ec9933e860ca75ee27f0c"
   integrity sha512-2w31R7SJtieJJnQtGc7RVL2StM2vGYVfqUOvUDxH6bC6aJTxPxTF0GnIgCyu7tjockiUWAYQRbxa7vKn34s5sQ==
@@ -8072,7 +8081,7 @@ memory-fs@^0.2.0:
   resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.2.0.tgz#f2bb25368bc121e391c2520de92969caee0a0290"
   integrity sha1-8rslNovBIeORwlIN6Slpyu4KApA=
 
-memory-fs@^0.4.0, memory-fs@~0.4.1:
+memory-fs@^0.4.0, memory-fs@^0.4.1, memory-fs@~0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.4.1.tgz#3a9a20b8462523e447cfbc7e8bb80ed667bfc552"
   integrity sha1-OpoguEYlI+RHz7x+i7gO1me/xVI=
@@ -8210,7 +8219,7 @@ mime@1.4.1:
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.4.1.tgz#121f9ebc49e3766f311a76e1fa1c8003c4b03aa6"
   integrity sha512-KI1+qOZu5DcW6wayYHSzR/tXKCDC5Om4s1z2QJjDULzLcmf3DvzS7oluY4HCTrc+9FiKmWUgeNLg7W3uIQvxtQ==
 
-mime@^2.0.3, mime@^2.2.0, mime@^2.3.1:
+mime@^2.0.3, mime@^2.2.0, mime@^2.3.1, mime@^2.4.2:
   version "2.4.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.4.tgz#bd7b91135fc6b01cde3e9bae33d659b63d8857e5"
   integrity sha512-LRxmNwziLPT828z+4YkNzloCFC2YM4wrB99k+AV5ZbEyfGNWfG8SO1FUXLmLDBSo89NrJZ4DIWeLjy1CHGhMGA==
@@ -8457,10 +8466,10 @@ negotiator@0.6.1:
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
   integrity sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=
 
-neo-async@^2.5.0, neo-async@^2.6.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.0.tgz#b9d15e4d71c6762908654b5183ed38b753340835"
-  integrity sha512-MFh0d/Wa7vkKO3Y3LlacqAEeHK0mckVqzDieUKTT+KGxi+zIpeVsFxymkIiRpbpDziHc290Xr9A1O4Om7otoRA==
+neo-async@^2.5.0, neo-async@^2.6.0, neo-async@^2.6.1:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
+  integrity sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==
 
 nice-try@^1.0.4:
   version "1.0.5"
@@ -8729,11 +8738,6 @@ npm-run-path@^2.0.0:
     gauge "~2.7.3"
     set-blocking "~2.0.0"
 
-null-check@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/null-check/-/null-check-1.0.0.tgz#977dffd7176012b9ec30d2a39db5cf72a0439edd"
-  integrity sha1-l33/1xdgErnsMNKjnbXPcqBDnt0=
-
 num2fraction@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/num2fraction/-/num2fraction-1.2.2.tgz#6f682b6a027a4e9ddfa4564cd2589d1d4e669ede"
@@ -9288,7 +9292,7 @@ performance-now@^2.1.0:
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
   integrity sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=
 
-picomatch@^2.0.5:
+picomatch@^2.0.4, picomatch@^2.0.5:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.0.7.tgz#514169d8c7cd0bdbeecc8a2609e34a7163de69f6"
   integrity sha512-oLHIdio3tZ0qH76NybpeneBhYVj0QFTfXEFTc/B3zKQspYfYYkWYgFsmzo+4kvId/bQRcNkVeguI3y+CD22BtA==
@@ -9918,10 +9922,10 @@ randomfill@^1.0.3:
     randombytes "^2.0.5"
     safe-buffer "^5.1.0"
 
-range-parser@^1.0.3, range-parser@^1.2.0, range-parser@~1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.0.tgz#f49be6b487894ddc40dcc94a322f611092e00d5e"
-  integrity sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4=
+range-parser@^1.0.3, range-parser@^1.2.0, range-parser@^1.2.1, range-parser@~1.2.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
+  integrity sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==
 
 raphael@^2.2.7:
   version "2.2.7"
@@ -10035,7 +10039,7 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
-"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.0, readable-stream@^2.3.3, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
+"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.3, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
   version "2.3.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
   integrity sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==
@@ -10100,6 +10104,13 @@ readdirp@^2.0.0:
     readable-stream "^2.0.2"
     set-immediate-shim "^1.0.1"
 
+readdirp@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-3.1.1.tgz#b158123ac343c8b0f31d65680269cc0fc1025db1"
+  integrity sha512-XXdSXZrQuvqoETj50+JAitxz1UPdt5dupjT6T5nVB+WvjMv2XKYj+s7hPeAVCXvmJrL36O4YYyWlIC3an2ePiQ==
+  dependencies:
+    picomatch "^2.0.4"
+
 realpath-native@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/realpath-native/-/realpath-native-1.1.0.tgz#2003294fea23fb0672f2476ebe22fcf498a2d65c"
@@ -10393,11 +10404,6 @@ repeat-element@^1.1.2:
   resolved "https://registry.yarnpkg.com/repeat-element/-/repeat-element-1.1.3.tgz#782e0d825c0c5a3bb39731f84efee6b742e6b1ce"
   integrity sha512-ahGq0ZnV5m5XtZLMb+vP76kcAM5nkLqk0lpqAuojSKGgQtn4eRi4ZZGm2olo2zKFH+sMsWaqOCW1dqAnOru72g==
 
-repeat-string@^0.2.2:
-  version "0.2.2"
-  resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-0.2.2.tgz#c7a8d3236068362059a7e4651fc6884e8b1fb4ae"
-  integrity sha1-x6jTI2BoNiBZp+RlH8aITosftK4=
-
 repeat-string@^1.5.0, repeat-string@^1.5.4, repeat-string@^1.6.1:
   version "1.6.1"
   resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-1.6.1.tgz#8dcae470e1c88abc2d600fff4a776286da75e637"
@@ -10566,10 +10572,10 @@ ret@~0.1.10:
   resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
   integrity sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==
 
-rfdc@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.1.2.tgz#e6e72d74f5dc39de8f538f65e00c36c18018e349"
-  integrity sha512-92ktAgvZhBzYTIK0Mja9uen5q5J3NRVMoDkJL2VMwq6SXjVCgqvQeVP2XAaUY6HT+XpQYeLSjb3UoitBryKmdA==
+rfdc@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.1.4.tgz#ba72cc1367a0ccd9cf81a870b3b58bd3ad07f8c2"
+  integrity sha512-5C9HXdzK8EAqN7JDif30jqsBzavB7wLpaubisuQIGHWf2gUXSpzy6ArX/+Da8RjFpagWsCn+pIgxTMAmKw9Zug==
 
 rimraf@2, rimraf@2.6.3, rimraf@^2.2.8, rimraf@^2.5.4, rimraf@^2.6.0, rimraf@^2.6.1, rimraf@^2.6.3:
   version "2.6.3"
@@ -10878,6 +10884,13 @@ sha1@^1.1.1:
     charenc ">= 0.0.1"
     crypt ">= 0.0.1"
 
+shallow-clone@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/shallow-clone/-/shallow-clone-3.0.1.tgz#8f2981ad92531f55035b01fb230769a40e02efa3"
+  integrity sha512-/6KqX+GVUdqPuPPd2LxDDxzX6CAbjJehAAOKlNpqqUpAqPM6HeL8f+o3a+JsyGjn2lv0WY8UsTgUJjU9Ok55NA==
+  dependencies:
+    kind-of "^6.0.2"
+
 shebang-command@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
@@ -11114,6 +11127,11 @@ source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
+source-map@^0.7.3:
+  version "0.7.3"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.7.3.tgz#5302f8169031735226544092e64981f751750383"
+  integrity sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==
+
 space-separated-tokens@^1.0.0:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/space-separated-tokens/-/space-separated-tokens-1.1.4.tgz#27910835ae00d0adfcdbd0ad7e611fb9544351fa"
@@ -11303,15 +11321,16 @@ stream-shift@^1.0.0:
   resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"
   integrity sha1-1cdSgl5TZ+eG944Y5EXqIjoVWVI=
 
-streamroller@0.7.0:
-  version "0.7.0"
-  resolved "https://registry.yarnpkg.com/streamroller/-/streamroller-0.7.0.tgz#a1d1b7cf83d39afb0d63049a5acbf93493bdf64b"
-  integrity sha512-WREzfy0r0zUqp3lGO096wRuUp7ho1X6uo/7DJfTlEi0Iv/4gT7YHqXDjKC2ioVGBZtE8QzsQD9nx1nIuoZ57jQ==
+streamroller@^1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/streamroller/-/streamroller-1.0.6.tgz#8167d8496ed9f19f05ee4b158d9611321b8cacd9"
+  integrity sha512-3QC47Mhv3/aZNFpDDVO44qQb9gwB9QggMEE0sQmkTAwBVYdBRWISdsywlkfm5II1Q5y/pmrHflti/IgmIzdDBg==
   dependencies:
-    date-format "^1.2.0"
-    debug "^3.1.0"
-    mkdirp "^0.5.1"
-    readable-stream "^2.3.0"
+    async "^2.6.2"
+    date-format "^2.0.0"
+    debug "^3.2.6"
+    fs-extra "^7.0.1"
+    lodash "^4.17.14"
 
 strict-uri-encode@^1.0.0:
   version "1.1.0"
@@ -12284,6 +12303,11 @@ unist-util-visit@^1.0.0, unist-util-visit@^1.1.0, unist-util-visit@^1.3.0:
   dependencies:
     unist-util-visit-parents "^2.0.0"
 
+universalify@^0.1.0:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"
+  integrity sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==
+
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
@@ -12394,12 +12418,12 @@ use@^3.1.0:
   resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
   integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
 
-useragent@2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/useragent/-/useragent-2.2.1.tgz#cf593ef4f2d175875e8bb658ea92e18a4fd06d8e"
-  integrity sha1-z1k+9PLRdYdei7ZY6pLhik/QbY4=
+useragent@2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/useragent/-/useragent-2.3.0.tgz#217f943ad540cb2128658ab23fc960f6a88c9972"
+  integrity sha512-4AoH4pxuSvHCjqLO04sU6U/uE65BYza8l/KKBS0b0hnUPWi+cQ2BpeTEwejCSx9SPV5/U03nniDTrWx5NrmKdw==
   dependencies:
-    lru-cache "2.2.x"
+    lru-cache "4.1.x"
     tmp "0.0.x"
 
 util-deprecate@^1.0.1, util-deprecate@~1.0.1:
@@ -12781,7 +12805,7 @@ webpack-cli@^3.2.1:
     v8-compile-cache "^2.0.2"
     yargs "^12.0.4"
 
-webpack-dev-middleware@3.4.0, webpack-dev-middleware@^3.2.0:
+webpack-dev-middleware@3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.4.0.tgz#1132fecc9026fd90f0ecedac5cbff75d1fb45890"
   integrity sha512-Q9Iyc0X9dP9bAsYskAVJ/hmIZZQwf/3Sy4xCAZgL5cUkjZmUZLt4l5HpbST/Pdgjn3u6pE7u5OdGd1apgzRujA==
@@ -12791,6 +12815,16 @@ webpack-dev-middleware@3.4.0, webpack-dev-middleware@^3.2.0:
     range-parser "^1.0.3"
     webpack-log "^2.0.0"
 
+webpack-dev-middleware@^3.7.0:
+  version "3.7.0"
+  resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.0.tgz#ef751d25f4e9a5c8a35da600c5fda3582b5c6cff"
+  integrity sha512-qvDesR1QZRIAZHOE3iQ4CXLZZSQ1lAUsSpnQmlB1PBfoN/xdRjmge3Dok0W4IdaVLJOGJy3sGI4sZHwjRU0PCA==
+  dependencies:
+    memory-fs "^0.4.1"
+    mime "^2.4.2"
+    range-parser "^1.2.1"
+    webpack-log "^2.0.0"
+
 webpack-dev-server@^3.1.14:
   version "3.1.14"
   resolved "https://registry.yarnpkg.com/webpack-dev-server/-/webpack-dev-server-3.1.14.tgz#60fb229b997fc5a0a1fc6237421030180959d469"