Bug 1232654 - Update whitenoise from v2.0.4 to v2.0.6
Bug 1232654 - Update whitenoise from v2.0.4 to v2.0.6

https://github.com/evansd/whitenoise/blob/master/CHANGELOG.rst
https://github.com/evansd/whitenoise/compare/v2.0.4...v2.0.6

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