Bump urllib3 from 1.25.8 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.8 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.8...1.26.5)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:development
...

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

Author: dependabot[bot]

dev.requirements.txt

@@ -41,6 +41,6 @@ toml==0.10.0
 tox==3.14.5
 tqdm==4.43.0
 twine==1.15.0
-urllib3==1.25.8
+urllib3==1.26.5
 virtualenv==20.0.7
 webencodings==0.5.1