Add dry run version for npm release

.github/workflows/Publish_to_NPM.yml

@@ -0,0 +1,34 @@
+name: Publish to NPM (Dry run on prerelease)
+
+on:
+  release:
+    types: [prereleased, released]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: 12
+
+    - run: git config --global user.name "NPM release bot"
+    - run: git config --global user.email "<>"
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Build
+      run: npm run build
+
+    - run: npm version ${{ github.event.release.tag_name }}
+
+    - name: Publish to NPM
+      if: ${{ github.event.action }} == 'prereleased'
+      run: npm publish --dry-run
+      env:
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

RELEASE.md

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+To test a release one can create a prerelease and it will run npm publish with the --dry-run argument.
+
+This was implemented with prereleases since github does currently not support workflow triggers for draft releases. ([Github discussion](https://github.com/orgs/community/discussions/7118))
+
+Published normal releases automatically update the npm package.