BZip2 constructor Null safety

1. Flutter
2. archive_io
3. BZip2
4. BZip2 constructor

BZip2 class

1. Constructors
2. BZip2
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. emptyInt32List
13. emptyUint32List
14. emptyUint8List
15. initialCrc
16. Static methods
17. finalizeCrc
18. updateCrc
19. Constants
20. bzhSignature
21. compressedMagic
22. eosMagic
23. hdr0