Bump urllib3 from 1.26.4 to 1.26.5 (stlehmann#250)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.4 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@1.26.4...1.26.5)

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

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

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

requirements.txt

@@ -14,10 +14,6 @@ certifi==2020.12.5
     # via requests
 chardet==4.0.0
     # via requests
-colorama==0.4.4
-    # via
-    #   sphinx
-    #   tox
 commonmark==0.9.1
     # via recommonmark
 distlib==0.3.1
@@ -86,7 +82,7 @@ toml==0.10.2
     # via tox
 tox==3.23.0
     # via -r requirements.in
-urllib3==1.26.4
+urllib3==1.26.5
     # via requests
 virtualenv==20.4.4
     # via tox