Update Library for Swift 5

[TopeMateo]

Hi, I'm still using this library on my app, and I was hoping if you have any plans on updating it for Swift 5.

[mahen3d]

I too use it in my app, do we have any alternative for this, since this is not updated I think we have to move away from this and find a new one. We cant be keep on fixing issues everytime we do the podupdate.

[Esqarrouth]

You guys can update for Swift 5 and create PR. Then review it between each other. If it is ready, I can merge. I don't currently have the tools to test it myself