chore(package): update @angular-devkit/build-angular to version 0.901.6

Closes #32

Author: greenkeeper[bot]

demo/package.json

@@ -59,7 +59,7 @@
     "zone.js": "^0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^0.13.7",
+    "@angular-devkit/build-angular": "^0.901.6",
     "@angular/cli": "^7.3.7",
     "@angular/compiler-cli": "^7.2.11",
     "@angular/language-service": "^7.2.11",