Build #92 (Mar 31, 2022 9:09:13 AM)

1. Fix on required keyword. (detail)
2. Implement deltas between v2.1.1 and 2.2.1 (detail)
3. add first draft of v2.2.1 (detail)
4. update version to 2.2.1 (detail)
5. add .gitignore (detail)
6. fix missing import (detail)
7. delete redundant proto file for _links structure (detail)
8. update README with correct code generation procedure (detail)
9. add new .proto files to the list for v2.2.1 (detail)
10. add procedure for proto3 generation and validation (detail)

Started by GitLab push by Elian Kraja

• origin/stf606-final