Bump requests from 2.20.1 to 2.21.0

Bumps [requests](https://github.com/requests/requests) from 2.20.1 to 2.21.0.
- [Release notes](https://github.com/requests/requests/releases)
- [Changelog](https://github.com/requests/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v2.20.1...v2.21.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

setup.py

@@ -11,7 +11,7 @@
     version='1.0.1',
     packages=['hydra'],
     install_requires=[
-        'requests==2.20.1',
+        'requests==2.21.0',
     ],
     author='O.S. Systems Software LTDA',
     author_email='contato@ossystems.com.br',