build: update angular framework packages to next`

Author: alan-agius4

package.json

@@ -33,8 +33,8 @@
     "webpack": "^4.0.0"
   },
   "devDependencies": {
-    "@angular/compiler": "^8.0.0-beta.14",
-    "@angular/compiler-cli": "^8.0.0-beta.14",
+    "@angular/compiler": "~8.1.0-next.1",
+    "@angular/compiler-cli": "~8.1.0-next.1",
     "typescript": "3.4.5",
     "webpack": "4.33.0"
   }