v0.3.0

• improvements:
  • docs
  • better error handling and expose exception type
  • const constructors when possible
• breaking: UserClient user(String userId) is now StreamUser user(String userId) for easier state management
• breaking: change type of Reaction model field user from Map<String,dynamic> to User
• new: serverside methods for CRUD operations on User(getUser, createUser, updateUser, deleteUser)
• new: CancelToken, OnSendProgress named parameters to support cancelling an upload and tracking its progress
• new: logger options to allow choosing the Logger level
• fix: missing field ownChildren in Reaction model
• new: allow sending enrichment flags in filter mehod
• new: createReactionReference