fix: fix compile error

Still have test errors, probably related to parsing

Author: cpb8010

examples/demo-app/smart-contracts/DemoPaymaster.sol

@@ -14,7 +14,7 @@ import { IPaymaster, ExecutionResult, PAYMASTER_VALIDATION_SUCCESS_MAGIC } from
 import { IPaymasterFlow } from "@matterlabs/zksync-contracts/l2/system-contracts/interfaces/IPaymasterFlow.sol";
 import { TransactionHelper, Transaction } from "@matterlabs/zksync-contracts/l2/system-contracts/libraries/TransactionHelper.sol";
 
-import "@matterlabs/zksync-contracts/l2/system-contracts/Constants.sol";
+import { BOOTLOADER_FORMAL_ADDRESS } from "@matterlabs/zksync-contracts/l2/system-contracts/Constants.sol";
 
 /// @author Matter Labs
 /// @notice DO NOT USE THIS FOR PRODUCTION. This contract does not include any validations other than using the paymaster general flow.

examples/nft-quest-contracts/contracts/NFTQuestPaymaster.sol

@@ -5,9 +5,9 @@ import { IPaymaster, ExecutionResult, PAYMASTER_VALIDATION_SUCCESS_MAGIC } from
 import { IPaymasterFlow } from "@matterlabs/zksync-contracts/l2/system-contracts/interfaces/IPaymasterFlow.sol";
 import { TransactionHelper, Transaction } from "@matterlabs/zksync-contracts/l2/system-contracts/libraries/TransactionHelper.sol";
 
-import "@matterlabs/zksync-contracts/l2/system-contracts/Constants.sol";
+import { BOOTLOADER_FORMAL_ADDRESS } from "@matterlabs/zksync-contracts/l2/system-contracts/Constants.sol";
 
-import "@openzeppelin/contracts/access/Ownable.sol";
+import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 
 /// @author Matter Labs
 /// @notice This contract does not include any validations other than using the paymaster general flow.

examples/nft-quest-contracts/contracts/ZeekNFTQuest.sol

@@ -2,8 +2,8 @@
 
 pragma solidity ^0.8.0;
 
-import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
-import "@openzeppelin/contracts/access/Ownable.sol";
+import { ERC721 } from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 
 contract ZeekNFTQuest is ERC721, Ownable {
   uint256 private _tokenIds;