chore(package): update commitizen to version 4.0.5

Closes #171

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "@babel/preset-env": "7.8.7",
     "@babel/template": "7.8.6",
     "babel-jest": "24.9.0",
-    "commitizen": "3.1.2",
+    "commitizen": "4.0.5",
     "cz-conventional-changelog": "2.1.0",
     "eslint": "6.6.0",
     "husky": "3.0.9",