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

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "sinon-chai": "2.11.0",
     "strong-error-handler": "2.1.0",
     "supertest": "3.0.0",
-    "validate-commit-msg": "2.12.2"
+    "validate-commit-msg": "2.12.3"
   },
   "repository": {
     "type": "git",