Upload GitHub release assets

You can now upload GitHub release assets when an SDK is published:

targets:
  # Or any other target
  typescript:
    publish:
      release_assets:
        github:
          - ./path/to/what/you/want/to/upload
            # Or this
          - name: Display Name
            path: ./path/to/what/you/want/to/upload
          # As many as you want...

This is useful for uploading bundled or compiled artifacts or additional documentation files to your GitHub release.