chore(package): update ember-cli-dependency-checker to version 2.2.1

Closes #63

Author: greenkeeper[bot]

package.json

@@ -79,7 +79,7 @@
     "ember-cli": "2.10.0",
     "ember-cli-app-version": "^2.0.0",
     "ember-cli-babel": "^5.1.7",
-    "ember-cli-dependency-checker": "^1.3.0",
+    "ember-cli-dependency-checker": "^2.2.1",
     "ember-cli-eslint": "3.0.0",
     "ember-cli-htmlbars": "^1.0.10",
     "ember-cli-htmlbars-inline-precompile": "^0.3.3",