- Again tweak failing tests

- update to 4.3.18:
- Fixed an issue with parsing files that contain unicode characters in Python 2
- Fixed issue #924 - Pulling in pip internals causes depreciation warning
- Fixed issue #938 - Providing a way to filter explicitly passed in files via configuration settings (`--filter-files`)
- Improved interoperability with toml configuration files

- skip failing tests
- Update to 4.3.17:
- Fixed issue #905 & #919: Import section headers behaving
strangely

- Add missing recommended dependencies

- update to version 4.3.16:
- Fixed issue #909 - skip and skip-glob are not enforced when using settings-path.
- Fixed issue #907 - appdirs optional requirement does not correctly specify version
- Fixed issue #902 - Too broad warning about missing toml package
- Fixed issue #778 - remove `user` from known standard library as it's no longer in any supported Python version.