Update setuptools to 49.0.0

[pyup-bot]

This PR updates setuptools from 48.0.0 to 49.0.0.

Changelog

49.0.0

-------

* 2165: Setuptools no longer installs a site.py file during easy_install or develop installs. As a result, .eggs on PYTHONPATH will no longer take precedence over other packages on sys.path. If this issue affects your production environment, please reach out to the maintainers at 2165.
* 2137: Removed (private) pkg_resources.RequirementParseError, now replaced by packaging.requirements.InvalidRequirement. Kept the name for compatibility, but users should catch InvalidRequirement instead.
* 2180: Update vendored packaging in pkg_resources to 19.2.
* 2199: Fix exception causes all over the codebase by using ``raise new_exception from old_exception``

Links

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

[alshapton]

Here is an overview of what got changed by this pull request:

Issues
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- Added 1
           

See the complete overview on Codacy

[alshapton]

Codacy found an issue: [no-literal-urls] Don’t use literal URLs without angle brackets