- added testcases from https://github.com/eu-digital-green-certificates/dgc-testdata
- fixed testcases issues with schema test files from https://github.com/eu-digital-green-certificates/ehn-dgc-schema
- Some failing unit tests from dgc-testdata, but in my mind those are issues within the provided testdata.
- Basic implementation which allows parsing of DGC.
- Some failing unit tests (incorrect json DGCs not failing on missing elements).
- Basic implementation for just passing tests.