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* Add support to the new PyMongo driver version 4.0 (34).
* Add support to the types ``MinKey`` / ``MaxKey``
from MongoDB (35).
* Remove deprecated SSL arguments in favor of the
new *TLS* arguments.
* Remove support to Python 2.6, 3.3, and 3.4.
* Fix when a query fails Mongo doesn't
record ``nreturned`` (number of record returned).
* Fix Mongo logs ``killcursors`` operations with different
cases causing exception when parsing logs.