fix: upgrade commitizen from 4.0.5 to 4.1.2 (#11)

Snyk has created this PR to upgrade commitizen from 4.0.5 to 4.1.2.

See this package in NPM:
https://www.npmjs.com/package/commitizen

See this project in Snyk:
https://app.snyk.io/org/wallace41290/project/948d3534-f195-42f8-b20c-055729fc9646?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -66,7 +66,7 @@
     "@types/jest": "^23.3.2",
     "@types/node": "^10.11.0",
     "colors": "^1.3.2",
-    "commitizen": "^4.0.5",
+    "commitizen": "^4.1.2",
     "coveralls": "^3.0.2",
     "cross-env": "^5.2.0",
     "cz-conventional-changelog": "^2.1.0",