Merge branch 'v2-prototype' of github.com:0xProject/0x-monorepo into v2-prototype

* 'v2-prototype' of github.com:0xProject/0x-monorepo:
  Update artifacts
  Update yarn.lock
  Fix warnings in Metacoin
  Upgrade UglifyJS to include ES6 support
  Add CancelOrder and MatchOrder types
  Add missing return types
  Ignore classnames linter rule

1 files changed, 3 insertions, 3 deletions

diff --git a/packages/metacoin/contracts/Metacoin.sol b/packages/metacoin/contracts/Metacoin.sol
index ac212b32e..dc67e6242 100644
--- a/packages/metacoin/contracts/Metacoin.sol
+++ b/packages/metacoin/contracts/Metacoin.sol
@@ -1,4 +1,4 @@
-pragma solidity ^0.4.21;
+pragma solidity ^0.4.24;
 pragma experimental ABIEncoderV2;
 
 contract Metacoin {
@@ -16,7 +16,7 @@ contract Metacoin {
         uint32 callback;
     }
 
-    function Metacoin() public {
+    constructor () public {
         balances[msg.sender] = 10000;
     }
 
@@ -24,7 +24,7 @@ contract Metacoin {
         if (balances[msg.sender] < transferData.amount) return false;
         balances[msg.sender] -= transferData.amount;
         balances[transferData.to] += transferData.amount;
-        Transfer(msg.sender, transferData.to, transferData.amount);
+        emit Transfer(msg.sender, transferData.to, transferData.amount);
         return true;
     }