chore(deps): update dependency commitizen to v4

Author: renovate-bot

package.json

@@ -84,7 +84,7 @@
     "babel-plugin-istanbul": "5.1.4",
     "babel-plugin-source-map-support": "2.1.1",
     "chai": "4.2.0",
-    "commitizen": "3.1.2",
+    "commitizen": "4.0.0",
     "coveralls": "3.0.5",
     "cross-env": "5.2.0",
     "cz-conventional-changelog": "2.1.0",

yarn.lock

@@ -2243,10 +2243,10 @@ commander@~2.8.1:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
-commitizen@3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/commitizen/-/commitizen-3.1.2.tgz#29ddd8b39396923e9058a0e4840cbeef144290be"
-  integrity sha512-eD0uTUsogu8ksFjFFYq75LLfXeLXsCIa27TPfOqvBI+tCx1Pp5QfKqC9oC+qTpSz3nTn9/+7TL5mE/wurB22JQ==
+commitizen@4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/commitizen/-/commitizen-4.0.0.tgz#53b804f551d64fec12bc536f063d1496227735eb"
+  integrity sha512-RY1FdpnCdmm9hppCXkR/hIHARKEbCZQHKKO7KEYm+9DpVTNte3IE6+fidK1N0rTE9VjIbEU0QZyTHfM1NQ7XIQ==
   dependencies:
     cachedir "2.1.0"
     cz-conventional-changelog "2.1.0"