BREAKING CHANGE: Python 3.8 and 3.9 are no longer supported
- MCP package requires Python >=3.10 (all versions from 0.9.1 to 1.9.3)
- Update setup.py to require Python >=3.10
- Update GitHub Actions to only test Python 3.10, 3.11, and 3.12
- Update README.md with correct Python version requirement
- Remove typing-extensions dependency (not needed for Python 3.10+)
- Remove Python 3.8/3.9 from classifiers
This resolves all GitHub Actions failures for Python 3.8/3.9 tests.
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Co-Authored-By: Claude <noreply@anthropic.com>