Bump whitenoise from 5.0 to 5.0.1

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 5.0 to 5.0.1.
- [Release notes](https://github.com/evansd/whitenoise/releases)
- [Changelog](https://github.com/evansd/whitenoise/blob/master/docs/changelog.rst)
- [Commits](https://github.com/evansd/whitenoise/compare/v5.0...v5.0.1)

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

requirements.txt

@@ -15,7 +15,7 @@ pysolr==3.8.1
 redis==3.3.11
 requests==2.22.0
 uWSGI==2.0.18
-whitenoise==5.0
+whitenoise==5.0.1
 
 # Linting
 flake8==3.7.9