Fast sync companion PR (#3078)

* Fixed build

* Bumped trie-db

* update Substrate

* impl-guide: fix broken links

Co-authored-by: parity-processbot <>
Co-authored-by: Andronik Ordian <write@reusable.software>

polkadot/node/core/chain-api/src/lib.rs

@@ -394,6 +394,7 @@ mod tests {
 				finalized_hash,
 				finalized_number,
 				number_leaves: 0,
+				finalized_state: None,
 			}
 		}
 		fn number(&self, hash: Hash) -> sp_blockchain::Result<Option<BlockNumber>> {