Bump lru from 0.7.8 to 0.8.0 (#6060)

* Bump lru from 0.7.8 to 0.8.0

Bumps [lru](https://github.com/jeromefroe/lru-rs) from 0.7.8 to 0.8.0.
- [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/0.7.8...0.8.0)

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

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

* Change `LruCache` paramerter to `NonZeroUsize`

* Change type of `session_cache_lru_size` to `NonZeroUsize`

* Add expects instead of unwrap

Co-authored-by: Bastian Köcher <info@kchr.de>

* Use match to get rid of expects

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sebastian Kunert <skunert49@gmail.com>
Co-authored-by: Bastian Köcher <info@kchr.de>

polkadot/node/network/dispute-distribution/src/lib.rs

@@ -24,6 +24,8 @@
 //! The sender is responsible for getting our vote out, see [`sender`]. The receiver handles
 //! incoming [`DisputeRequest`]s and offers spam protection, see [`receiver`].
 
+use std::num::NonZeroUsize;
+
 use futures::{channel::mpsc, FutureExt, StreamExt, TryFutureExt};
 
 use polkadot_node_network_protocol::authority_discovery::AuthorityDiscovery;
@@ -145,7 +147,8 @@ where
 	) -> Self {
 		let runtime = RuntimeInfo::new_with_config(runtime::Config {
 			keystore: Some(keystore),
-			session_cache_lru_size: DISPUTE_WINDOW.get() as usize,
+			session_cache_lru_size: NonZeroUsize::new(DISPUTE_WINDOW.get() as usize)
+				.expect("Dispute window can not be 0; qed"),
 		});
 		let (tx, sender_rx) = mpsc::channel(1);
 		let disputes_sender = DisputeSender::new(tx, metrics.clone());