Bump urllib3 from 1.26.17 to 1.26.18

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.17 to 1.26.18.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.17...1.26.18)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

requirements-dev.txt

@@ -122,7 +122,7 @@ twine==4.0.2
     # via -r requirements-dev.in
 typing-extensions==4.4.0
     # via mypy
-urllib3==1.26.17
+urllib3==1.26.18
     # via
     #   requests
     #   twine