added step to publish to npm (#3)

.github/workflows/npm-publish.yml

@@ -0,0 +1,27 @@
+name: NPM Release
+
+on:
+  release:
+    types:
+      - released
+
+env:
+  CI: true
+
+jobs:
+  publish:
+    name: Build & Publish to NPM
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+          registry-url: "https://registry.npmjs.org"
+      - run: npm ci
+      - name: Set version
+        run: npm version --no-git-tag-version ${{github.event.release.tag_name}}
+      - run: npm run build
+      - run: npm publish --provenance --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}