Update python-slugify to 2.0.0

[pyup-bot]

This PR updates python-slugify from 1.2.6 to 2.0.0.

Changelog

2.0.0

- Fix alternative dependency installation

Links

• PyPI: https://pypi.org/project/python-slugify
• Changelog: https://pyup.io/changelogs/python-slugify/
• Repo: https://github.com/un33k/python-slugify

[coveralls]

Pull Request Test Coverage Report for Build 535

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 70.449%

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Totals
Change from base Build 532:	0.0%
Covered Lines:	1633
Relevant Lines:	2318

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #123