Update parking_lot requirement from 0.10 to 0.11

Updates the requirements on [parking_lot](https://github.com/Amanieu/parking_lot) to permit the latest version.
- [Release notes](https://github.com/Amanieu/parking_lot/releases)
- [Changelog](https://github.com/Amanieu/parking_lot/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Amanieu/parking_lot/compare/0.10.0...0.11.0)

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

Cargo.toml

@@ -28,7 +28,7 @@ jemallocator = "0.3.2"
 libsodium-sys-stable= "1.19.5"
 log = { version = "0.4.8", features = ["std", "release_max_level_debug"] }
 socket2 = "0.3"
-parking_lot = "0.10"
+parking_lot = "0.11"
 privdrop = "0.3.4"
 rand = "0.7"
 rustc-hash = "1"