Update @angular/cli version

Author: mprahl

package.json

@@ -31,7 +31,7 @@
     "zone.js": "^0.8.14"
   },
   "devDependencies": {
-    "@angular/cli": "1.5.0",
+    "@angular/cli": "^1.6.0",
     "@angular/compiler-cli": "^5.0.0",
     "@angular/language-service": "^5.0.0",
     "@types/jasmine": "~2.5.53",