Automatically build on merge to master

Author: fwal

.github/workflows/build.yml

@@ -0,0 +1,23 @@
+name: Build
+
+on:
+  push:
+    branches:
+    - master
+
+jobs:
+  build-dist:
+    name: Build distribution
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        ref: ${{ github.head_ref }}
+
+    - run: npm install
+    - run: npm run pack-source-map
+
+    - uses: stefanzweifel/git-auto-commit-action@v4.2.0
+      with:
+        file_pattern: dist/index.js
+        commit_message: New dist