If the release doesn't publish, then publish rc

.github/workflows/release.yml

@@ -35,3 +35,36 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_AUTH_TOKEN_SHARED }}
+
+      - name: Create .npmrc
+        if: steps.changesets.outputs.published != 'true'
+        run: |
+          cat << EOF > "$HOME/.npmrc"
+            //registry.npmjs.org/:_authToken=$NPM_TOKEN
+          EOF
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_AUTH_TOKEN_SHARED }}
+
+      - name: Publish release candidate
+        if: steps.changesets.outputs.published != 'true'
+        run: |
+          echo "$( jq ".version = \"$(echo $version)-rc.$(echo $GITHUB_SHA)\"" package.json )" > package.json
+          yarn publish -tag next
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Output canary version number
+        if: steps.changesets.outputs.published != 'true'
+        uses: actions/github-script@v3
+        with:
+          script: |
+            const package = require(`${process.env.GITHUB_WORKSPACE}/package.json`)
+            github.repos.createCommitStatus({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              sha: context.sha,
+              state: 'success',
+              context: `Published ${package.name}`,
+              description: package.version,
+              target_url: `https://unpkg.com/${package.name}@${package.version}/`
+            })