feat(orc-483): add Web3.to_checksum_address to delegation contract

Author: chasingrainbows

src/providers/execution/contracts/delegation_contract.py

@@ -3,6 +3,7 @@
 
 from eth_abi.abi import encode
 from eth_typing import ChecksumAddress
+from web3 import Web3
 from web3.contract.contract import ContractFunction
 from web3.types import BlockIdentifier
 
@@ -45,7 +46,7 @@ def get_admin(self, block_identifier: BlockIdentifier = 'latest') -> ChecksumAdd
             'block_identifier': repr(block_identifier),
             'to': self.address
         })
-        return cast(ChecksumAddress, response)
+        return Web3.to_checksum_address(response)
 
     def get_delegatee(self, block_identifier: BlockIdentifier = 'latest') -> ChecksumAddress:
         """Get current delegatee address"""
@@ -56,5 +57,5 @@ def get_delegatee(self, block_identifier: BlockIdentifier = 'latest') -> Checksu
             'block_identifier': repr(block_identifier),
             'to': self.address
         })
-        return cast(ChecksumAddress, response)
+        return Web3.to_checksum_address(response)