Bump urllib3 from 1.24 to 1.24.2

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.24 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...1.24.2)

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

Author: dependabot[bot]

requirements.txt

@@ -30,4 +30,4 @@ torchtext==0.2.1
 torchvision==0.2.0
 tornado==5.0.2
 tqdm==4.28.1
-urllib3==1.24
+urllib3==1.24.2