Include a build provenance attestation when publishing to npm.

Author: johnbillion

.github/workflows/deploy.yml

@@ -27,13 +27,12 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
-          cache: npm
           registry-url: https://registry.npmjs.org
 
       - name: Install dependencies
         run: npm ci
 
       - name: Publish package
-        run: npm publish --access public
+        run: npm publish --provenance --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}