Extensions: FirestoreShardedCounter Swift Client

[naturalui]

[READ] Step 1: Are you in the right place?

Got the extension working with Javascript Sample Client but was wondering if anyone is aware of a Swift port.

[REQUIRED] Step 2: Extension name

Distributed Counter - https://github.com/firebase/extensions/tree/master/firestore-counter

What feature would you like to see?

Swift Client Library for firestore-counter

How would you use it?

In our iOS Application :)

[russellwheatley]

Seems like a potential feature request, thanks for the submission.

[jhuleatt]

~@peterfriese would you be interested in giving this a try before we release it?~

(edit: oops, you're already on the PR. just linked this issue to that to avoid future confusion)