Parsing errors

[alcuadrado]

Hi Fede,

I'm opening this issue to track the different parsing errors which I found when creating this PR.

These files can't be parsed:

• https://github.com/0xProject/0x-monorepo/blob/bc0ae6be318a15bf8670a6da9a59d9bdb12cadae/packages/contracts/src/contracts/current/protocol/AssetProxy/ERC20Proxy.sol
• https://github.com/0xProject/0x-monorepo/blob/bc0ae6be318a15bf8670a6da9a59d9bdb12cadae/packages/contracts/src/contracts/current/protocol/AssetProxy/ERC721Proxy.sol

[federicobond]

Thanks! This is related to the recently introduced multi variable definition statements. It has been fixed in master. I will publish an update soon.