Add Coverage for Comp (#4)

* almost full coverage for comp

* remove only

* almost complete coverage comp

* full comp coverage

.solcover.js

@@ -1,3 +1,3 @@
 module.exports = {
-  skipFiles: ["GovernorAlpha.sol", "SafeMath.sol"],
+  skipFiles: ["GovernorAlpha.sol", "SafeMath.sol", "test/"],
 };

contracts/test/Multicall.sol

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.16;
+
+/// @title Multicall - Aggregate results from multiple read-only function calls
+/// @author Michael Elliot <[email protected]>
+/// @author Joshua Levine <[email protected]>
+/// @author Nick Johnson <[email protected]>
+
+contract Multicall {
+    struct Call {
+        address target;
+        bytes callData;
+    }
+
+    function aggregate(
+        Call[] memory calls
+    ) public returns (uint256 blockNumber, bytes[] memory returnData) {
+        blockNumber = block.number;
+        returnData = new bytes[](calls.length);
+        for (uint256 i = 0; i < calls.length; i++) {
+            (bool success, bytes memory ret) = calls[i].target.call(
+                calls[i].callData
+            );
+            require(success);
+            returnData[i] = ret;
+        }
+    }
+}