chore(package): update commitizen to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -22,7 +22,7 @@
   "devDependencies": {
     "ava": "^0.25.0",
     "codecov": "^3.0.0",
-    "commitizen": "^2.9.6",
+    "commitizen": "^3.0.0",
     "cz-conventional-changelog": "^2.0.0",
     "delay": "^4.0.0",
     "dockerode": "^2.5.3",