chore(package): update cz-conventional-changelog to version 3.1.0

Closes #130

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "@commitlint/cli": "^7.0.0",
     "@commitlint/config-conventional": "^7.0.1",
     "commitizen": "^3.0.5",
-    "cz-conventional-changelog": "^2.1.0",
+    "cz-conventional-changelog": "^3.1.0",
     "eslint": "^5.0.1",
     "eslint-config-finn": "^3.0.1",
     "eslint-config-finn-prettier": "^3.0.2",