- Update to 4.0.0:
* Document more changes since 3.0.0
* Mention extra in another place in README
* Move testtools requirement to a "streams" extra
* Stop using testtools.helpers.try_import
* Fix MockPatchMultiple.DEFAULT
* Fix YAML type confusion
* Add support for Python 3.10
* Mark README as rST
* setup.cfg: Replace dashes with underscores
* Drop support for Python < 3.6, add 3.7 - 3.9
* Add possibility to reset the FakeLogger
* Add missing APIs to FakeProcess, making it match Popen (LP #1373224)
- Remove patch fixtures-pr36-py39.patch:
* Included upstream.
- Add patch handle-no-external-mock.patch:
* Skip a testcase if mock is not available.
- Bump required versions of pbr and testtools.
- Correct URL.