TarEncoder constructor Null safety

1. Flutter
2. archive_io
3. TarEncoder
4. TarEncoder constructor

TarEncoder class

1. Constructors
2. TarEncoder
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. add
8. encode
9. finish
10. noSuchMethod
11. start
12. toString
13. Operators
14. operator ==