Optional params in Discord API endpoints don't work

[alboltdrogo]

Some of the Discord API endpoints that use optional parameters don't work.

For example Create Guild Ban:
The package expects "delete-message-days?" and "reason?", but discord expects "delete-message-days" and "reason".

[bkuhl]

Looks like you're right. The question mark indicates they're optional json parameters. Here's the ban docs for reference.

[bkuhl]

@alboltdrogo I'd imagine you can omit the ? when using this library as it probably strips them. If not, that's something we'll want to put in place.