chore: generate provenance statements on release (#13)

.github/workflows/release.yml

@@ -1,9 +1,16 @@
 name: release
 on: [push, pull_request]
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: write # to be able to publish a GitHub release
+  issues: write # to be able to comment on released issues
+  pull-requests: write # to be able to comment on released pull requests
+  id-token: write # to enable use of OIDC for npm provenance
+
 jobs:
   validate:
     name: 🔍 Validate
@@ -62,4 +69,5 @@ jobs:
             ]
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_CONFIG_PROVENANCE: true
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}