chore(package): update commitizen to version 4.0.3

Closes #16

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "@commitlint/config-conventional": "^7.5.0",
     "@semantic-release/changelog": "^3.0.2",
     "@semantic-release/git": "^7.0.8",
-    "commitizen": "^3.0.7",
+    "commitizen": "^4.0.3",
     "cz-conventional-changelog": "^2.1.0",
     "eslint": "^6.0.1",
     "eslint-config-bbva": "^2.0.4",