Bump lru from 0.6.6 to 0.7.0

Bumps [lru](https://github.com/jeromefroe/lru-rs) from 0.6.6 to 0.7.0.
- [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/0.6.6...0.7.0)

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

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

Cargo.toml

@@ -39,7 +39,7 @@ sqlite = "0.26.0"
 uuid = { version = "0.8.2", features = ["serde", "v4"] }
 mio = { version = "0.7.13", features = ["os-poll", "net"] }
 ureq = { version = "2.2", optional = true }
-lru = "0.6"
+lru = "0.7"
 derive_more = "0.99.16"
 lazy_static = "1.4.0"