Publish npm package with provenance (#19)

See https://docs.npmjs.com/generating-provenance-statements#publishing-packages-with-provenance-via-github-actions

Author: koddsson

.github/workflows/npm-publish.yml

@@ -10,6 +10,8 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
     steps:
       - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
@@ -23,6 +25,6 @@ jobs:
       - run: npm version ${TAG_NAME} --git-tag-version=false
         env:
           TAG_NAME: ${{ github.event.release.tag_name }}
-      - run: npm publish
+      - run: npm publish --provenance --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.npm_token }}