chore(deps): update dependency commitizen to v4.3.1

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "@commitlint/cli": "8.3.5",
     "@commitlint/config-conventional": "8.3.4",
     "@commitlint/travis-cli": "8.3.5",
-    "commitizen": "4.0.3",
+    "commitizen": "4.3.1",
     "cz-conventional-changelog": "3.0.2",
     "generate-changelog": "1.8.0",
     "husky": "3.1.0"