NIMTeamNotificationTypes constructor Null safety

1. nim_core
2. nim_core
3. NIMTeamNotificationTypes
4. NIMTeamNotificationTypes constructor

NIMTeamNotificationTypes class

1. Constructors
2. NIMTeamNotificationTypes
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. acceptInvite
13. addTeamManager
14. dismissTeam
15. inviteMember
16. kickMember
17. leaveTeam
18. muteTeamMember
19. passTeamApply
20. removeTeamManager
21. transferOwner
22. updateTeam