Bump setuptools from 46.1.3 to 46.2.0 (#267)

Bumps [setuptools](https://github.com/pypa/setuptools) from 46.1.3 to 46.2.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/master/CHANGES.rst)
- [Commits](pypa/setuptools@v46.1.3...v46.2.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

requirements-dev.txt

@@ -1,4 +1,4 @@
-setuptools==46.1.3
+setuptools==46.2.0
 wheel==0.34.2
 twine==3.1.1
 restructuredtext_lint==1.3.0