build: update @angular/cli to version ~1.7.0 (#68)

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
     "zone.js": "^0.8.14"
   },
   "devDependencies": {
-    "@angular/cli": "~1.6.0",
+    "@angular/cli": "~1.7.0",
     "@angular/compiler-cli": "^5.0.0",
     "@angular/language-service": "^5.0.0",
     "@types/chai": "^4.0.1",