build(deps): Update lru requirement from 0.6 to 0.7 (#2267)

Updates the requirements on [lru](https://github.com/jeromefroe/lru-rs) to permit the latest version.
- [Release notes](https://github.com/jeromefroe/lru-rs/releases)
- [Changelog](https://github.com/jeromefroe/lru-rs/blob/master/CHANGELOG.md)
- [Commits](jeromefroe/lru-rs@0.6.0...0.7.0)

---
updated-dependencies:
- dependency-name: lru
  dependency-type: direct:production
...

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

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

protocols/request-response/Cargo.toml

@@ -16,7 +16,7 @@ futures = "0.3.1"
 libp2p-core = { version = "0.30.0", path = "../../core", default-features = false  }
 libp2p-swarm = { version = "0.31.0", path = "../../swarm" }
 log = "0.4.11"
-lru = "0.6"
+lru = "0.7"
 rand = "0.7"
 smallvec = "1.6.1"
 unsigned-varint = { version = "0.7", features = ["std", "futures"] }