chore(package): update git-repo-version to version 0.3.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -23,7 +23,7 @@
     "broccoli-watchify": "^0.2.0",
     "ember-cli": "2.6.1",
     "ember-publisher": "0.0.7",
-    "git-repo-version": "0.3.0",
+    "git-repo-version": "0.3.1",
     "json3": "^3.3.2",
     "mocha": "^2.4.5",
     "promises-aplus-tests-phantom": "^2.1.0-revise",