updated PolyTokenFaucet on Kovan

Author: pabloruiz55

.gitignore

@@ -6,3 +6,4 @@ privKey
 coverage/
 coverage.json
 .vscode/launch.json
+/flat

flat/Migrations.sol

@@ -1,4 +1,4 @@
-pragma solidity ^0.4.23;
+pragma solidity ^0.4.24;
 
 contract Migrations {
 
@@ -11,7 +11,7 @@ contract Migrations {
         _;
     }
 
-    function Migrations() public {
+    constructor() public {
         owner = msg.sender;
     }