feat: Make supportsInterface function on OptimismMintableERC20.sol virtual

This change makes it possible for other contracts that inherit from OptimismMintableERC20 to register as supporting additional interfaces beyond those declared in the contract as it is.

packages/contracts-bedrock/contracts/universal/OptimismMintableERC20.sol

@@ -35,7 +35,7 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
         _;
     }
 
-    /// @custom:semver 1.0.1
+    /// @custom:semver 1.0.2
     /// @param _bridge      Address of the L2 standard bridge.
     /// @param _remoteToken Address of the corresponding L1 token.
     /// @param _name        ERC20 name.
@@ -45,7 +45,7 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
         address _remoteToken,
         string memory _name,
         string memory _symbol
-    ) ERC20(_name, _symbol) Semver(1, 0, 1) {
+    ) ERC20(_name, _symbol) Semver(1, 0, 2) {
         REMOTE_TOKEN = _remoteToken;
         BRIDGE = _bridge;
     }
@@ -79,7 +79,7 @@ contract OptimismMintableERC20 is IOptimismMintableERC20, ILegacyMintableERC20,
     /// @notice ERC165 interface check function.
     /// @param _interfaceId Interface ID to check.
     /// @return Whether or not the interface is supported by this contract.
-    function supportsInterface(bytes4 _interfaceId) external pure returns (bool) {
+    function supportsInterface(bytes4 _interfaceId) external pure virtual returns (bool) {
         bytes4 iface1 = type(IERC165).interfaceId;
         // Interface corresponding to the legacy L2StandardERC20.
         bytes4 iface2 = type(ILegacyMintableERC20).interfaceId;