fix(forks): Add type-4 transactions to Prague

Author: marioevz

src/ethereum_test_forks/forks/forks.py

@@ -1074,6 +1074,11 @@ def precompiles(cls, block_number: int = 0, timestamp: int = 0) -> List[Address]
             block_number, timestamp
         )
 
+    @classmethod
+    def tx_types(cls, block_number: int = 0, timestamp: int = 0) -> List[int]:
+        """At Prague, set-code type transactions are introduced."""
+        return [4] + super(Prague, cls).tx_types(block_number, timestamp)
+
     @classmethod
     def gas_costs(cls, block_number: int = 0, timestamp: int = 0) -> GasCosts:
         """