Bug Fixes
- Allow empty additional options
([479](https://github.com/python-semantic-release/python-semantic-release/pull/479),
[`c9b2514`](https://github.com/python-semantic-release/python-semantic-release/commit/c9b2514d3e164b20e78b33f60989d78c2587e1df))
Features
- Add `additional_options` input for GitHub Action
([477](https://github.com/python-semantic-release/python-semantic-release/pull/477),
[`aea60e3`](https://github.com/python-semantic-release/python-semantic-release/commit/aea60e3d290c6fe3137bff21e0db1ed936233776))