chore(package): update @angular/cli to version 9.0.4

Closes #18

Author: greenkeeper[bot]

demo/package.json

@@ -41,7 +41,7 @@
   "devDependencies": {
     "@angular-devkit/build-angular": "^0.13.9",
     "@angular-devkit/schematics": "^7.3.9",
-    "@angular/cli": "^7.3.9",
+    "@angular/cli": "^9.0.4",
     "@angular/compiler-cli": "^7.2.15",
     "@angular/language-service": "^7.2.15",
     "@angularclass/hmr": "~2.1.3",