Make snapshot_cache module public

Author: pawanjay176

beacon_node/beacon_chain/src/lib.rs

@@ -50,7 +50,7 @@ mod pre_finalization_cache;
 pub mod proposer_prep_service;
 pub mod schema_change;
 pub mod shuffling_cache;
-mod snapshot_cache;
+pub mod snapshot_cache;
 pub mod state_advance_timer;
 pub mod sync_committee_rewards;
 pub mod sync_committee_verification;