2.0.0 Beta 1

Initial release compatible with AMPHP v3.
As with other libraries compatible with AMPHP v3, most cases of parameters or returns of Promise<ResolutionType> have been replaced with ResolutionType.

• RespSocket and RespParser have been moved the the Amp\Redis\Connection sub-namespace. RespSocket is now an interface implemented by DefaultRespParser
• Added RedisConnector interface and a single implementation, RedisSocketConnector
• Mutex sub-namespace has been changed to Sync. All classes within now have a prefix of Redis, e.g., Mutex → RedisMutex, MutexOptions → RedisMutexOptions
• Added RedisParcel in the Sync sub-namespace implementing the Parcel interface from amphp/sync
• Subscription is now a simple PHP iterator now that Amp\Iterator is no longer necessary with fibers.
• Several classes now have a Redis prefix which did not before:
  • Config → RedisConfig
  • SetOptions → RedisSetOptions
  • SortOptions → RedisSortOptions
  • SocketException → RedisSocketException