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>

Author: dependabot[bot]

Pipfile

@@ -17,7 +17,7 @@ click = "==7.0"
 idna = "==2.8"
 itsdangerous = "==1.1.0"
 requests = "==2.21.0"
-urllib3 = "==1.24.1"
+urllib3 = "==1.24.2"
 Flask = "==1.0.2"
 Jinja2 = "==2.10"
 MarkupSafe = "==1.1.0"