Bump cachetools from 5.0.0 to 5.2.0 (from PR #1845)
Bump cachetools from 5.0.0 to 5.2.0 (from PR #1845)

Bumps [cachetools](https://github.com/tkem/cachetools) from 5.0.0 to 5.2.0.
- [Release notes](https://github.com/tkem/cachetools/releases)
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/tkem/cachetools/compare/v5.0.0...v5.2.0)

mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea