chore(package): update @angular/cli to version 9.1.5

Closes #148

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~0.13.0",
-    "@angular/cli": "~7.3.7",
+    "@angular/cli": "~9.1.5",
     "@angular/compiler-cli": "~7.2.0",
     "@angular/language-service": "~7.2.0",
     "@types/jasmine": "~2.8.8",