v1.15.0

Added

• type command (#207)

Fixed

• sadd no longer allow duplicate values (#204 @kesla)
• hset learned to create a new hash if not existing instead of throwing error (#207)
• hset updated to return integer reply according to redis spec (#207)

Internal

• set related commands (sadd, scard, etc) implemented using es6 Set instead of Array (#204 @kesla)
• hset tests refactored (#207)