Bump lru from 0.6.5 to 0.6.6 (#3583)

Bumps [lru](https://github.com/jeromefroe/lru-rs) from 0.6.5 to 0.6.6.
- [Release notes](https://github.com/jeromefroe/lru-rs/releases)
- [Changelog](https://github.com/jeromefroe/lru-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jeromefroe/lru-rs/compare/0.6.5...0.6.6)

---
updated-dependencies:
- dependency-name: lru
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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