Bump urllib3 from 1.25.3 to 1.25.8 (#119)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.3 to 1.25.8.
- [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/1.25.3...1.25.8)

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

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

requirements.prod.txt

@@ -16,5 +16,5 @@ pytz==2019.1
 requests==2.22.0
 soupsieve==1.9.2
 sqlparse==0.3.0
-urllib3==1.25.3
+urllib3==1.25.8
 uWSGI==2.0.18

requirements.txt

@@ -23,4 +23,4 @@ rjsmin==1.1.0
 six==1.12.0
 soupsieve==1.9.2
 sqlparse==0.3.0
-urllib3==1.25.3
+urllib3==1.25.8