release 3.7.2

package.json

 {
   "name": "echarts",
-  "version": "3.7.1",
+  "version": "3.7.2",
   "description": "A powerful charting and visualization library for browser",
   "keywords": [
     "visualization",
@@ -35,7 +35,7 @@
     "prepublish": "node build/amd2common.js"
   },
   "dependencies": {
-    "zrender": "^3.6.1"
+    "zrender": "^3.6.2"
   },
   "devDependencies": {
     "coordtransform": "^2.0.2",
@@ -45,6 +45,6 @@
     "fs-extra": "^0.26.5",
     "glob": "^7.0.0",
     "webpack": "^1.12.13",
-    "zrender": "^3.6.1"
+    "zrender": "^3.6.2"
   }
 }

src/echarts.js

@@ -1526,9 +1526,9 @@ define(function (require) {
         /**
          * @type {number}
          */
-        version: '3.7.1',
+        version: '3.7.2',
         dependencies: {
-            zrender: '3.6.1'
+            zrender: '3.6.2'
         }
     };