chore(package): update validate-commit-msg to version 2.12.3

Author: greenkeeper[bot]

package.json

@@ -54,7 +54,7 @@
     "semantic-release": "6.3.6",
     "sinon": "2.3.6",
     "sinon-chai": "2.11.0",
-    "validate-commit-msg": "2.12.2"
+    "validate-commit-msg": "2.12.3"
   },
   "dependencies": {
     "bluebird": "^3.5.0",