Bump urllib3 from 1.10.4 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.10.4 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.10.4...1.26.5)

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

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

requirements.txt

@@ -12,4 +12,4 @@ scikit-learn==0.16.1
 scipy==0.15.1
 seaborn==0.5.1
 six==1.9.0
-urllib3==1.10.4
+urllib3==1.26.5