v1.13.0

Features

• added mset command (#181)
• added msetnx command (#182)
• added dbsize command (#183)
• added lpushx command (#184)
• added incrbyfloat command (#185)
• added rpushx command (#186)
• added hincrbyfloat command (#187)
• added lpop command (#189)
• added rpop command (#190)
• added lindex command (#191)
• added srandmember command (#192)
• added lset command (#193)