Test coverage fixes

.solcover.js

@@ -1,5 +1,7 @@
 module.exports = {
   client: require('ganache-cli'),
+  measureStatementCoverage: false,
+  measureFunctionCoverage: false,
   skipFiles: [
     "../contracts-test",
     "../lib_0.5",

lib_0.5/compound/CEther.sol

@@ -142,7 +142,7 @@ contract CEther is CToken {
 
     function doTransferOut(address payable to, uint amount) internal returns (Error) {
         /* Send the Ether, with minimal gas and revert on failure */
-        to.transfer(amount);
+        to.call.value(amount)("");
         return Error.NO_ERROR;
     }
 

lib_0.5/maker/WETH9.sol

@@ -38,7 +38,7 @@ contract WETH9 {
     function withdraw(uint wad) public {
         require(balanceOf[msg.sender] >= wad);
         balanceOf[msg.sender] -= wad;
-        msg.sender.transfer(wad);
+        msg.sender.call.value(wad)("");
         emit Withdrawal(msg.sender, wad);
     }
 

lib_0.7/yearn/yVault.sol

@@ -156,7 +156,7 @@ contract yVault is ERC20 {
         }
 
         IWETH(address(token)).withdraw(r);
-        payable(msg.sender).transfer(r);
+        payable(msg.sender).call{value: r}("");
     }
 
     function withdrawAllETH() external {