Bump @angular-devkit/build-angular from 0.803.15 to 0.803.18 (#4508)

Bumps [@angular-devkit/build-angular](https://github.com/angular/angular-cli) from 0.803.15 to 0.803.18.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Commits](https://github.com/angular/angular-cli/commits)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>

package.json

@@ -133,7 +133,7 @@
     "zone.js": "0.9.1"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "0.803.15",
+    "@angular-devkit/build-angular": "0.803.18",
     "@angular/cli": "8.3.7",
     "@angular/compiler-cli": "8.0.3",
     "@angular/language-service": "8.2.13",