chore(package): update @angular/cli to version 7.3.3

Closes #33

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "zone.js": "^0.8.19"
   },
   "devDependencies": {
-    "@angular/cli": "^6.0.0-rc.4",
+    "@angular/cli": "^7.3.3",
     "@angular/compiler-cli": "^5.2.0",
     "@angular/language-service": "^6.0.0",
     "@types/jasmine": "~2.8.3",