MAINT: Update setuptools requirement from <49.2.0 to <57.1.0

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/CHANGES.rst)
- [Commits](pypa/setuptools@0.6...v57.0.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

test_requirements.txt

@@ -1,6 +1,6 @@
 cython==0.29.23
 wheel<0.36.3
-setuptools<49.2.0
+setuptools<57.1.0
 hypothesis==6.10.1
 pytest==6.2.3
 pytz==2021.1