Support Swift's `Set` as a JSON type

[jnpdx]

Is your feature request related to a problem? Please describe.
track(name: String, properties: [String: Any]? = nil) will crash if one of the Any is a Swift Set. It will not crash if that same property is an Array.

Describe the solution you'd like
Because to JSON, Array and Set are identical, it would be nice if Segment's JSON type could encode Set without crashing

Describe alternatives you've considered
At this point, we just ensure we're always sending an Array

Additional context
N/A

[rtharston]

It might be nice to support all types of Collection or maybe Sequence and treat them all like Array.

[bsneed]

Thanks @jnpdx & @rtharston! I'll have a look at this and get back to you guys shortly.

[bsneed]

I handled Set explicitly. I didn't see a good way to handle types like Collection or Sequence easily. If you guys have a suggestion, lemme know. Otherwise we'll roll with this.

[rtharston]

I handled Set explicitly. I didn't see a good way to handle types like Collection or Sequence easily. If you guys have a suggestion, lemme know. Otherwise we'll roll with this.

That's great! Thanks! The Collection and Sequence idea was just if it was simple. Set is the common one. 😄

[jnpdx]

Thanks so much!

[bsneed]

No problem! Thank you guys for the report!