Changelog for snack-0.4.0.0

[0.1.0.0] -- April 2022 [0.1.0.0]: https://github.com/mordae/snack/compare/initial...0.1.0.0

[0.2.0.0] -- April 2022 [0.2.0.0]: https://github.com/mordae/snack/compare/0.1.0.0...0.2.0.0

[0.3.0.0] -- April 2022 [0.3.0.0]: https://github.com/mordae/snack/compare/0.2.0.0...0.3.0.0

[0.4.0.0] -- July 2022 [0.4.0.0]: https://github.com/mordae/snack/compare/0.3.0.0...0.4.0.0