Bump rack from 2.0.6 to 2.0.7
Bump rack from 2.0.6 to 2.0.7

Bumps [rack](https://github.com/rack/rack) from 2.0.6 to 2.0.7.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rack/rack/compare/2.0.6...2.0.7)

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