Several changes

* Fix state cache pruning of finalized state from block map
* Update to latest `milhouse`
* Check beacon state diffs in EF tests

beacon_node/beacon_chain/tests/store_tests.rs

@@ -25,7 +25,6 @@ use store::{
     HotColdDB, LevelDB, StoreConfig,
 };
 use tempfile::{tempdir, TempDir};
-use tree_hash::TreeHash;
 use types::test_utils::{SeedableRng, XorShiftRng};
 use types::*;