------------------
* Drop Python 2.6 & 3.3 support, ensure Python 3.6+ support. Kudos to
`jezdez <https://github.com/jezdez>`_ for pull request & implementation
* Support subclasses of the Redis client class. Again kudos to
`jezdez <https://github.com/jezdez>`_ for pull request & implementation
* Use `inspect.getfullargspec()` if available. Kudos to
`vibiu <https://github.com/vibiu>`_ for pull request & implementation
* Use `redis.Redis` as default connection class, when using
`redis-py <https://github.com/andymccurdy/redis-py>`_ >= 3