feat(loginWithRedirect): add redirectMethod option

[slaywell]

Description

As per this closed issue where a PR contribution was suggested, we have a similar requirement (i.e. not to allow users to use 'browser back' to go back to a page where loginWithRedirect was called - and want to use window.location.replace to achieve this).

References

Add support for redirect with window.replace instead of window.assign #183

Testing

I have tested locally using npm link passing the new param redirectMethod to loginWithRedirect.
I have ensured that this param is not passed to the buildAuthorizeUrl method as we don't need it to be present as a search param on the Authorize URL.

I have added a new unit test for the change and verified that the existing unit tests pass without alteration indicating this is a non-breaking change.

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master

[stevehobbsdev]

Thanks for raising @slaywell, let us have a deep-dive into the PR this week, we'll come back to you shortly.

[stevehobbsdev]

All looks good @slaywell, thanks. Just attempting to fix build issues before we merge and release 🎉