Bump lru from 0.7.1 to 0.7.2 (#22161)

Bumps [lru](https://github.com/jeromefroe/lru-rs) from 0.7.1 to 0.7.2.
- [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/0.7.1...0.7.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gossip/Cargo.toml

@@ -17,7 +17,7 @@ flate2 = "1.0"
 indexmap = { version = "1.7", features = ["rayon"] }
 itertools = "0.10.3"
 log = "0.4.14"
-lru = "0.7.1"
+lru = "0.7.2"
 matches = "0.1.9"
 num-traits = "0.2"
 rand = "0.7.0"