FEAT override cookie domain option

[Soviut]

Changes

Added an optional cookieDomain setting to the client options that allows the domain set on the cookie to be explicitly set.

This is intended to allow a cookie to work across subdomains by setting it to top-level domain (eg: .example.com).

References

This is intended to solve this issue #884

Testing

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed

[stevehobbsdev]

Looks great, thanks for the contribution. Just left a comment where I think we can expand the docs a bit.

[stevehobbsdev]

Thanks for the contribution! 🎉

[Soviut]

Thanks for all the work reviewing and getting this feature over the line. I'm really excited to put it into practice.