Bump cancancan from 2.2.0 to 2.3.0

Bumps [cancancan](https://github.com/CanCanCommunity/cancancan) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/CanCanCommunity/cancancan/releases)
- [Changelog](https://github.com/CanCanCommunity/cancancan/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/CanCanCommunity/cancancan/compare/2.2.0...2.3.0)

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