Bump urllib3 from 1.25.3 to 1.25.8

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](urllib3/urllib3@1.25.3...1.25.8)

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

Author: dependabot[bot]

requirements.txt

@@ -28,7 +28,7 @@ scp==0.13.2
 six==1.15.0
 tqdm==4.35.0
 twine==3.2.0
-urllib3==1.25.3
+urllib3==1.25.8
 webencodings==0.5.1
 xmltodict==0.12.0
 zipp==3.3.0

setup.py

@@ -28,7 +28,7 @@
             'PyYAML==5.1.2',
             'requests==2.22.0',
             'tqdm==4.35.0',
-            'urllib3==1.25.3',
+            'urllib3==1.25.8',
             'xmltodict==0.12.0',
             'paramiko',
             'scp'