Bump guard-bundler from 2.2.0 to 2.2.1
Bump guard-bundler from 2.2.0 to 2.2.1

Bumps [guard-bundler](https://github.com/guard/guard-bundler) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/guard/guard-bundler/releases)
- [Commits](https://github.com/guard/guard-bundler/compare/v2.2.0...v2.2.1)

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