Switch interfaces back to solidity pragma 0.5 to 0.9

as these serve as integration points for projects

packages/contracts/contracts/L1/messaging/IL1ERC20Bridge.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /**
  * @title IL1ERC20Bridge

packages/contracts/contracts/L1/messaging/IL1StandardBridge.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 import "./IL1ERC20Bridge.sol";
 

packages/contracts/contracts/L1/rollup/ICanonicalTransactionChain.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/L1/rollup/IChainStorageContainer.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /**
  * @title IChainStorageContainer

packages/contracts/contracts/L1/rollup/IStateCommitmentChain.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /* Library Imports */
 import { Lib_OVMCodec } from "../../libraries/codec/Lib_OVMCodec.sol";

packages/contracts/contracts/libraries/bridge/CrossDomainEnabled.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /* Interface Imports */
 import { ICrossDomainMessenger } from "./ICrossDomainMessenger.sol";

packages/contracts/contracts/libraries/bridge/ICrossDomainMessenger.sol

 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.7;
+pragma solidity >0.5.0 <0.9.0;
 
 /**
  * @title ICrossDomainMessenger