build: add commitlint configuration

.github/workflows/commitlint.yml

@@ -0,0 +1,21 @@
+name: Commit lint
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: 13.x
+    - name: setup
+      run: |
+        npm install -g @commitlint/cli @commitlint/config-conventional
+    - name: commitlint
+      run: |
+        git log --format=%B -n 1 $GITHUB_SHA | commitlint
+

commitlint.config.js

@@ -0,0 +1 @@
+module.exports = {extends: ['@commitlint/config-conventional']}