Bump urllib3 from 1.22 to 1.24.2

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.22 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@1.22...1.24.2)

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

Author: dependabot[bot]

requirements.txt

@@ -9,6 +9,6 @@ Pillow==5.1.0
 psutil==5.4.3
 pytz==2018.3
 requests==2.18.4
-urllib3==1.22
+urllib3==1.24.2
 ldap3==2.5
 validate_email