chore(package): update @angular/cli to version 9.1.1

Closes #130

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "0.803.20",
-    "@angular/cli": "8.3.20",
+    "@angular/cli": "9.1.1",
     "@angular/compiler-cli": "8.2.14",
     "@angular/language-service": "8.2.14",
     "@types/google.analytics": "0.0.40",