Please add a "deadline" option to close the vote at a certain time

[Flowdalic]

Please add a "deadline" option to close the vote at a certain time.

[odeialba]

Hello @Flowdalic
That's actually a great idea!
I'm quite busy at the moment, but I'll add it as soon as I can.
In the meantime, feel free to provide a Pull request. Help is always welcome :)