refactor(pragma): update solidity pragmas

src/interfaces/IERC20.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.5.0;
+pragma solidity >=0.6.2;
 
 /// @title IERC20
 /// @author Morpho Labs

src/interfaces/IIrm.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.5.0;
+pragma solidity >=0.6.2;
 
 import {MarketParams, Market} from "./IMorpho.sol";
 

src/interfaces/IMorpho.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.5.0;
+pragma solidity >=0.8.8;
 
 type Id is bytes32;
 

src/interfaces/IMorphoCallbacks.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.5.0;
+pragma solidity >=0.6.2;
 
 /// @title IMorphoLiquidateCallback
 /// @notice Interface that liquidators willing to use `liquidate`'s callback must implement.

src/interfaces/IOracle.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity >=0.5.0;
+pragma solidity >=0.6.2;
 
 /// @title IOracle
 /// @author Morpho Labs

src/libraries/SafeTransferLib.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.0;
+pragma solidity ^0.8.12;
 
 import {ErrorsLib} from "../libraries/ErrorsLib.sol";