require dep on ember-cli-version-checker 2.1.0

Author: csantero

package.json

@@ -44,6 +44,7 @@
     "ember-cli-string-utils": "^1.1.0",
     "ember-cli-test-info": "^1.0.0",
     "ember-cli-valid-component-name": "^1.0.0",
+    "ember-cli-version-checker": "^2.1.0",
     "ember-router-generator": "^1.2.3",
     "execa": "^0.9.0",
     "exists-sync": "^0.0.4",