Bump requests from 2.27.1 to 2.31.0 in /tests (#168)

Bumps [requests](https://github.com/psf/requests) from 2.27.1 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](https://github.com/psf/requests/compare/v2.27.1...v2.31.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/tests/requirements.txt b/tests/requirements.txt
index c57bfd6..812592e 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,3 +1,3 @@
 pytest==5.4.3
-requests==2.27.1
+requests==2.31.0
 urllib3==1.26.5