Split ERC20Votes and ERC20VotesComp (#2706)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

contracts/mocks/ERC20VotesCompMock.sol

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+
+import "../token/ERC20/extensions/ERC20VotesComp.sol";
+
+contract ERC20VotesCompMock is ERC20VotesComp {
+    constructor (string memory name, string memory symbol)
+    ERC20(name, symbol)
+    ERC20Permit(name)
+    {}
+
+    function mint(address account, uint256 amount) public {
+        _mint(account, amount);
+    }
+
+    function burn(address account, uint256 amount) public {
+        _burn(account, amount);
+    }
+
+    function getChainId() external view returns (uint256) {
+        return block.chainid;
+    }
+}