v1.2.0

What's changed

• Drop Python 2 and Python < 3.10 support; Python 3.10–3.14 now required
• Add type hints and type declarations (PEP 561 py.typed marker)
• Migrate build tooling to pyproject.toml, drop setup.py
• Remove dead Python 2 compatibility shims (ENCODING constant, next() aliases)
• Modernize CI: uv-based workflow, trusted publishing to PyPI, Dependabot