V3.0

[ZEDGR]

Breaking Changes

• Replace module-level functions with a Client / AsyncClient class — all calls now go through an instance (client.tournaments.show(...) instead of challonge.tournaments.show(...))
• API responses are now typed dataclasses (Tournament, Participant, Match, MatchAttachment) instead of plain dicts — use attribute access (t.name) instead of key access (t["name"])
• set_credentials(), set_timezone(), and other module-level state helpers removed — pass user, api_key, and timezone to the Client constructor instead
• fetch() / fetch_and_parse() are no longer public

New Features

• AsyncClient with full async/await support via httpx.AsyncClient — all domain methods are awaitable
• Context manager support: with Client(...) as client and async with AsyncClient(...) as client
• timezone parameter on Client / AsyncClient accepts IANA timezone strings (e.g. "Asia/Seoul")
• New models.py module with Tournament, Participant, Match, and MatchAttachment dataclasses

Improvements

• Switch from unittest to pytest
• Add async smoke tests covering all four resource domains