chore(package): update @commitlint/config-conventional to version 8.3.4

Closes #23

Author: greenkeeper[bot]

Diff for: package.json

@@ -43,7 +43,7 @@
   "homepage": "https://github.com/basics/code-snippet-to-svg#readme",
   "devDependencies": {
     "@commitlint/cli": "^8.3.4",
-    "@commitlint/config-conventional": "^7.0.1",
+    "@commitlint/config-conventional": "^8.3.4",
     "babel-cli": "^6.26.0",
     "babel-eslint": "^10.0.0",
     "babel-plugin-add-module-exports": "^1.0.0",