fix: generate provenance statements on release (#244)

Co-authored-by: Yosuke Ota <[email protected]>

.github/workflows/ci.yml

@@ -17,6 +17,12 @@ concurrency:
     group: ${{ github.workflow }}-${{ github.ref }}
     cancel-in-progress: true
 
+permissions:
+    contents: write # to be able to publish a GitHub release
+    id-token: write # to enable use of OIDC for npm provenance
+    issues: write # to be able to comment on released issues
+    pull-requests: write # to be able to comment on released pull requests
+
 jobs:
     lint:
         name: ⬣ Lint
@@ -126,4 +132,5 @@ jobs:
                       ]
               env:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  NPM_CONFIG_PROVENANCE: true
                   NPM_TOKEN: ${{ secrets.NPM_TOKEN }}