fix(chain-spec): add erc20 to deperacated class (#156)

Currently, the class hash is included in the state updates - we only add the class artifact to the class registry but for it to be canonically considered 'declared', the class hash needs to be added into the `StateUpdates` struct i.e., int the `deprecated_declared_classes` field.

Author: kariy

crates/chain-spec/src/dev.rs

@@ -168,6 +168,8 @@ fn add_default_fee_tokens(states: &mut StateUpdatesWithClasses, genesis: &Genesi
         .entry(DEFAULT_LEGACY_ERC20_CLASS_HASH)
         .or_insert_with(|| DEFAULT_LEGACY_ERC20_CLASS.clone());
 
+    states.state_updates.deprecated_declared_classes.insert(DEFAULT_LEGACY_ERC20_CLASS_HASH);
+
     // -- ETH
     add_fee_token(
         states,