Update dependency @angular/cli to v8

Author: renovate-bot

package.json

@@ -27,7 +27,7 @@
     "devDependencies": {
         "@angular-devkit/build-angular": "0.6.8",
         "@angular/compiler-cli": "6.1.10",
-        "@angular/cli": "6.0.8",
+        "@angular/cli": "8.3.3",
         "@angular/language-service": "6.1.10",
         "@types/jasmine": "2.8.16",
         "@types/jasminewd2": "2.0.6",