Bump urllib3 from 1.24.1 to 1.24.2

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.24.1 to 1.24.2.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/master/CHANGES.rst)
- [Commits](urllib3/urllib3@1.24.1...1.24.2)

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

requirements.txt

@@ -15,7 +15,7 @@ python-dotenv==0.12.0
 requests==2.21.0
 six==1.12.0
 soupsieve==2.0.1
-urllib3==1.24.1
+urllib3==1.24.2
 Werkzeug==0.14.1
 wikipedia==1.4.0
 xkcd==2.4.2