Fix arbitrary check kintsugi
@@ -5,6 +5,7 @@ use std::{ops::Index, slice::SliceIndex};
use test_random_derive::TestRandom;
use tree_hash_derive::TreeHash;
+#[cfg_attr(feature = "arbitrary-fuzz", derive(arbitrary::Arbitrary))]
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Encode, Decode, TreeHash)]
#[ssz(enum_behaviour = "union")]
#[tree_hash(enum_behaviour = "union")]
