Bump urllib3 from 1.26.12 to 1.26.13 (#381)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.12 to 1.26.13.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.13/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.12...1.26.13)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -32,7 +32,7 @@ requests==2.28.1
 six==1.16.0
 transaction==3.0.1
 translationstring==1.4
-urllib3==1.26.12
+urllib3==1.26.13
 venusian==3.0.0
 waitress==2.1.2
 WebOb==1.8.7