Bump rake from 12.1.0 to 12.2.1
Bump rake from 12.1.0 to 12.2.1

Bumps [rake](https://github.com/ruby/rake) from 12.1.0 to 12.2.1.
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](https://github.com/ruby/rake/compare/v12.1.0...v12.2.1)
theodi/bothan,theodi/metrics-api,theodi/bothan,theodi/bothan,theodi/bothan,theodi/metrics-api,theodi/metrics-api