- update to 3.2.0:
* Add support for async reconnect_failed callbacks in
AsyncConnectionPool (ticket #520).
* Add check parameter to the pool constructor and check_connection()
method. (ticket #656).
* Make connection pool classes generic on the connection type (ticket
#559).
* Raise a warning if sync pools rely an implicit open=True and the
pool context is not used. In the future the default will become
False (ticket #659).
* Raise a warning if async pools are opened in the constructor. In
the future it will become an error. (ticket #659).