Update ddt to 1.4.1

[pyup-bot]

This PR updates ddt from 1.2.1 to 1.4.1.

Changelog

1.4.1

- Due to numerous problems removed `nose` dependency completely in favor of `pytest`.
- Fixed compatibility with Python 2.7

1.4.0

- Added support for index-only test names

1.3.1

- Switched from Travis to Github Actions for builds and release upload.

1.3.0

- Added the ability to specify the YAML loader in the `file_data` decorator (77)
- Dropped Python 3.4 support

1.2.2

* Merge pull request 76 from Harmon758/url-updates
* Merge pull request 74 from carlwgeorge/stdlib-mock

Links

• PyPI: https://pypi.org/project/ddt
• Changelog: https://pyup.io/changelogs/ddt/
• Repo: https://github.com/datadriventests/ddt