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

Closes #47

Author: greenkeeper[bot]

demo/package.json

@@ -51,7 +51,7 @@
     "@angular-devkit/build-angular": "^0.10.7",
     "@angular-devkit/core": "^7.3.5",
     "@angular-devkit/schematics": "^7.3.5",
-    "@angular/cli": "^7.3.5",
+    "@angular/cli": "^9.0.4",
     "@angular/compiler-cli": "^7.2.8",
     "@angular/language-service": "^7.2.8",
     "@angularclass/hmr": "~2.1.3",