chore(package): update ember-cli-dependency-checker to version 3.1.0

Closes #8

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "ember-ajax": "^3.0.0",
     "ember-cli": "~2.18.0",
     "ember-cli-code-coverage": "^1.0.0-beta.1",
-    "ember-cli-dependency-checker": "^2.0.0",
+    "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-eslint": "^4.2.1",
     "ember-cli-github-pages": "^0.2.0",
     "ember-cli-htmlbars": "^2.0.1",