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* Drop support for Python 3.3, which is end of life.
* Officially support Python 3.6 and 3.7.
* Switch to the next version of the Strongarm API. This allows access to
blacklisted, whitelisted, and content filtered domains.
* A new filter() method is added to the Domain resource.
* The status (blacklisted, whitelisted, or filtered) of a domain is returned.
* The domain description can be added and viewed.
* The classification of infections is returned.