Update mime-types requirement from = 3.1 to = 3.2.2
Update mime-types requirement from = 3.1 to = 3.2.2

Updates the requirements on [mime-types](https://github.com/mime-types/ruby-mime-types) to permit the latest version.
- [Release notes](https://github.com/mime-types/ruby-mime-types/releases)
- [Changelog](https://github.com/mime-types/ruby-mime-types/blob/master/History.md)
- [Commits](https://github.com/mime-types/ruby-mime-types/compare/v3.1...v3.2.2)

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