Set up automated npm publish

.github/workflows/publish-on-tag.yml

@@ -0,0 +1,26 @@
+name: publish-on-tag
+
+on:
+  push:
+    tags:
+    - '*'
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install dependencies
+        run: npm install
+      - name: Build
+        run: npm run build
+      - name: Test
+        run: npm test
+      - name: Publish
+        env:
+          NPM_TOKEN: ${{secrets.NPM_TOKEN}}
+        run: |
+          npm config set registry 'https://wombat-dressing-room.appspot.com/'
+          npm config set '//wombat-dressing-room.appspot.com/:_authToken' '${NPM_TOKEN}'
+          npm publish

README.md

@@ -1,4 +1,4 @@
-# unicode-property-aliases-ecmascript [![Build status](https://travis-ci.org/mathiasbynens/unicode-property-aliases-ecmascript.svg?branch=master)](https://travis-ci.org/mathiasbynens/unicode-property-aliases-ecmascript)
+# unicode-property-aliases-ecmascript [![Build status](https://travis-ci.org/mathiasbynens/unicode-property-aliases-ecmascript.svg?branch=main)](https://travis-ci.org/mathiasbynens/unicode-property-aliases-ecmascript) [![unicode-property-aliases-ecmascript on npm](https://img.shields.io/npm/v/unicode-property-aliases-ecmascript)](https://www.npmjs.com/package/unicode-property-aliases-ecmascript)
 
 _unicode-property-aliases-ecmascript_ offers Unicode property alias mappings in an easy-to-consume JavaScript format. It only contains the Unicode property names that are supported in [ECMAScript RegExp property escapes](https://github.com/tc39/proposal-regexp-unicode-property-escapes).
 
@@ -27,6 +27,28 @@ propertyAliases.get('scx')
 // → 'Script_Extensions'
 ```
 
+## For maintainers
+
+### How to publish a new release
+
+1. On the `main` branch, bump the version number in `package.json`:
+
+    ```sh
+    npm version patch -m 'Release v%s'
+    ```
+
+    Instead of `patch`, use `minor` or `major` [as needed](https://semver.org/).
+
+    Note that this produces a Git commit + tag.
+
+1. Push the release commit and tag:
+
+    ```sh
+    git push && git push --tags
+    ```
+
+    Our CI then automatically publishes the new release to npm.
+
 ## Author
 
 | [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |