Pycrate

**Full Changelog**: https://github.com/pycrate-org/pycrate/compare/0.7.5...0.7.7

- Fix the mobile NAS JSON parser to properly parse optional fields

- Minor fixes and improvements for mobile NAS structures
- Update of the OS and Python version in the CICD

Add support for the O-RAN E2AP protocol, based on ASN.1

Cosmetic updates related to the new home of the project.
Explicit exception when encoding / decoding from ASN.1 parameterized objects.
Extend JSON API for mobile NAS signalling structures and information elements.
Fix bugs in the 5G NAS UE Policy protocol.