Bump pyfxa from 0.6.0 to 0.7.1
Bump pyfxa from 0.6.0 to 0.7.1

Bumps [pyfxa](https://github.com/mozilla/PyFxA) from 0.6.0 to 0.7.1.
- [Release notes](https://github.com/mozilla/PyFxA/releases)
- [Changelog](https://github.com/mozilla/PyFxA/blob/master/CHANGES.txt)
- [Commits](https://github.com/mozilla/PyFxA/compare/v0.6.0...v0.7.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mozilla-services/kinto-dist,Kinto/kinto-dist,Kinto/kinto-dist,mozilla-services/kinto-dist