feat(actions): auto-generate release notes (#1258)

Using the `--generate-notes` flag of the `gh release create` command.

Also, the `GITHUB_REF_NAME` environment variable is newly used.
See <https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables>

.github/workflows/release.yml

@@ -18,8 +18,9 @@ jobs:
       - run: npm publish
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-      - run: echo "::set-output name=tag::${GITHUB_REF/refs\/tags\//}"
-        id: get_tag
-      - run: gh release create '${{ steps.get_tag.outputs.tag }}' --notes 'See the [changelog](https://github.com/${{ github.repository }}/blob/${{ steps.get_tag.outputs.tag }}/CHANGELOG.md) for more details.'
+      - run: |
+          gh release create "${GITHUB_REF_NAME}" \
+            --generate-notes \
+            --notes "See the [changelog](https://github.com/${GITHUB_REPOSITORY}/blob/${GITHUB_REF_NAME}/CHANGELOG.md) for more details."
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

test/__snapshots__/init.test.js.snap

@@ -195,9 +195,10 @@ jobs:
       - run: npm publish
         env:
           NODE_AUTH_TOKEN: \${{ secrets.NPM_TOKEN }}
-      - run: echo \\"::set-output name=tag::\${GITHUB_REF/refs\\\\/tags\\\\//}\\"
-        id: get_tag
-      - run: gh release create '\${{ steps.get_tag.outputs.tag }}' --notes 'See the [changelog](https://github.com/\${{ github.repository }}/blob/\${{ steps.get_tag.outputs.tag }}/CHANGELOG.md) for more details.'
+      - run: |
+          gh release create \\"\${GITHUB_REF_NAME}\\" \\\\
+            --generate-notes \\\\
+            --notes \\"See the [changelog](https://github.com/\${GITHUB_REPOSITORY}/blob/\${GITHUB_REF_NAME}/CHANGELOG.md) for more details.\\"
         env:
           GITHUB_TOKEN: \${{ secrets.GITHUB_TOKEN }}
 "