v1.1.2

• fix bug: redis command encoding bug
• optimization: sync change on acquring lock from redis-py
• fix bug: decrement connection count on connection disconnected
• fix bug: initiation error of aws cluster client caused by not appropiate function list used
• fix bug: use ssl_context instead of ssl_keyfile,ssl_certfile,ssl_cert_reqs,ssl_ca_certs in intialization of connection_pool