feat: allow custom nonce in OIDAuthorizationRequest

[vonovak]

this PR is in response to this PR which has been opened ~ year ago and appears to be in a limbo

google/GoogleSignIn-iOS#244

The PR did get a review from @mdmathias who pointed out one issue here that seems to prevent the PR from getting merged.

There is a substantial community interest to get the PR merged and it appears there is willingness on the google side as well.

I'm attempting to unblock the PR by adding the initializer that is being asked for in the review comment (linked above).

Thank you in advance for your review

[vonovak]

edit: I'm listed here so I believe the agreement signing part is done

I signed the contributor agreement. According to https://github.com/openid/AppAuth-iOS/blob/master/CONTRIBUTING.md there's two to sign, but I only really saw one.

Hope somebody's going to review this :D

[mdmathias]

@vonovak I will be OOO for about 1.5 weeks starting tomorrow. I promise to take a look when I am back. Thanks!

[mdmathias]

Sorry! Just one last suggestion to make an assert more clear. Ready to go after this.

[vonovak]

thanks for review and merge! 🙂

[mdmathias]

Absolutely, thanks for the contribution. :D

[vonovak]

@mdmathias would you please share an ETA for the next release? I'd like to integrate this change into https://github.com/google/GoogleSignIn-iOS

thank you

[mdmathias]

We are currently working on adding a privacy manifest for this library, and the next release will be out before Spring 2024.