chore(package): update validate-commit-msg to version 2.13.1

Closes #21

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "sinon": "2.3.5",
     "sinon-chai": "2.11.0",
     "strong-error-handler": "2.1.0",
-    "validate-commit-msg": "2.12.2"
+    "validate-commit-msg": "2.13.1"
   },
   "dependencies": {
     "bluebird": "3.5.0",