build(deps): bump deflate from 0.7.19 to 0.7.20

Bumps [deflate](https://github.com/image-rs/deflate-rs) from 0.7.19 to 0.7.20.
- [Release notes](https://github.com/image-rs/deflate-rs/releases)
- [Changelog](https://github.com/image-rs/deflate-rs/blob/dev/changelog.md)
- [Commits](https://github.com/image-rs/deflate-rs/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>