fix ssz (#5755)

consensus/types/src/attestation.rs

@@ -67,9 +67,9 @@ pub struct Attestation<E: EthSpec> {
     #[superstruct(only(Electra), partial_getter(rename = "aggregation_bits_electra"))]
     pub aggregation_bits: BitList<E::MaxValidatorsPerSlot>,
     pub data: AttestationData,
-    pub signature: AggregateSignature,
     #[superstruct(only(Electra))]
     pub committee_bits: BitVector<E::MaxCommitteesPerSlot>,
+    pub signature: AggregateSignature,
 }
 
 impl<E: EthSpec> Decode for Attestation<E> {

consensus/types/src/eth_spec.rs

@@ -408,6 +408,8 @@ impl EthSpec for MainnetEthSpec {
 pub struct MinimalEthSpec;
 
 impl EthSpec for MinimalEthSpec {
+    type MaxCommitteesPerSlot = U4;
+    type MaxValidatorsPerSlot = U8192;
     type SlotsPerEpoch = U8;
     type EpochsPerEth1VotingPeriod = U4;
     type SlotsPerHistoricalRoot = U64;
@@ -432,8 +434,6 @@ impl EthSpec for MinimalEthSpec {
         SubnetBitfieldLength,
         SyncCommitteeSubnetCount,
         MaxValidatorsPerCommittee,
-        MaxCommitteesPerSlot,
-        MaxValidatorsPerSlot,
         GenesisEpoch,
         HistoricalRootsLimit,
         ValidatorRegistryLimit,