Bump flipper from 0.20.3 to 0.20.4 (#2196)
Bump flipper from 0.20.3 to 0.20.4 (#2196)

Bumps [flipper](https://github.com/jnunemaker/flipper) from 0.20.3 to 0.20.4.
- [Release notes](https://github.com/jnunemaker/flipper/releases)
- [Changelog](https://github.com/jnunemaker/flipper/blob/master/Changelog.md)
- [Commits](https://github.com/jnunemaker/flipper/compare/v0.20.3...v0.20.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
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