fix tests after rename

tests/test_ssz.nim

@@ -109,10 +109,6 @@ suite "Tree hashing":
     let vr = Validator()
     check: hash_tree_root(vr).len > 0
 
-  test "Hash ShardCommittee":
-    let sc = ShardCommittee()
-    check: hash_tree_root(sc).len > 0
-
   test "Hash BeaconBlock":
     ## TODO: Test genesis hash when spec is updated
     let bb = BeaconBlock()

tests/test_state_transition.nim

@@ -97,7 +97,7 @@ suite "Block processing":
       attestation = makeAttestation(
         state, previous_block_root,
         #state.shard_committees_at_slots[state.slot][0].committee[0])
-        crosslink_committees[0].a[0])
+        crosslink_committees[0].committee[0])
 
     # Some time needs to pass before attestations are included - this is
     # to let the attestation propagate properly to interested participants