Use axios url parameter instead of baseURL

[novascreen]

Description

This changes the axios request parameters to use url instead of baseURL. baseURL should only be used in combination with url, otherwise it should only be url.

This caused an error for me when working with Axios Mock Adapter since it expected a url to exist. I've created a PR for that particular library, but this might cause issues elsewhere.

References

• Handle request with undefined url ctimmerm/axios-mock-adapter#274

Testing

The existing tests already cover this

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

[jimmyjames]

Looks good, thanks for the contribution! 🎉