ci: add dry-run flag to release workflow

.github/workflows/release.yml

@@ -18,6 +18,11 @@ on:
         required: true
         default: false
         type: boolean
+      dryrun:
+        description: 'Dry run'
+        required: false
+        default: false
+        type: boolean
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -40,11 +45,16 @@ jobs:
           node-version: lts/*
           cache: npm
       - run: npm ci
-        # Branches that will release new versions are defined in .releaserc.json
+      - run: npx semantic-release --dry-run
+        # Don't allow interrupting the release step if the job is cancelled, as it can lead to an inconsistent state
+        # e.g. git tags were pushed but it exited before `npm publish`
+        if: always() && github.event.inputs.dryrun == 'true'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - run: npx semantic-release
         # Don't allow interrupting the release step if the job is cancelled, as it can lead to an inconsistent state
         # e.g. git tags were pushed but it exited before `npm publish`
-        if: always()
+        if: always() && github.event.inputs.dryrun == 'false'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_PUBLISH_TOKEN }}