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] <[email protected]>

Author: dependabot[bot]

Diff for: dgrtwo-translations/requirements-2019-04-22.txt

@@ -148,7 +148,7 @@ twine==3.1.1
 typed-ast==1.4.1
 typing-extensions==3.7.4.1
 tzlocal==2.0.0
-urllib3==1.25.8
+urllib3==1.24.2
 validators==0.14.2
 voila==0.1.20
 watchdog==0.10.2

Diff for: requirements.txt

@@ -78,7 +78,7 @@ testpath==0.4.2
 tornado==5.1.1
 traitlets==4.3.2
 tzlocal==1.5.1
-urllib3==1.24.1
+urllib3==1.24.2
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.2