fix: missing test contract

Author: jaybuidl

contracts/src/token/TestERC20.sol

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.8.18;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract TestERC20 is ERC20 {
+    constructor(string memory _name, string memory _symbol) ERC20(_name, _symbol) {
+        _mint(msg.sender, 1000000 ether);
+    }
+}