Official API 🎉

Version 1.2.1

Major refactoring due to the discovery of the API.

Codebase

• Moved all methods related to downloading files (including test cases) to Group.
• Created get_test_cases and get_files methods in Group.
• We are now using the API (which mysteriously appeared) to get the year/course structure.

Full Changelog: v1.1.1...v1.2.1