Add permissions for provenance

Author: keithamus

.github/workflows/publish.yml

@@ -8,6 +8,9 @@ jobs:
   publish-npm:
     name: Publish to npm
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3