Update @angular-devkit/build-angular to the latest version 🚀 (#3521)

* chore(package): update @angular-devkit/build-angular to version 0.12.2

* chore(package): update lockfile package-lock.json

package.json

@@ -104,7 +104,7 @@
     "zone.js": "0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "0.12.1",
+    "@angular-devkit/build-angular": "0.12.2",
     "@angular/cli": "7.2.2",
     "@angular/compiler-cli": "7.1.4",
     "@angular/language-service": "7.1.4",