Bump mypy-extensions from 0.4.3 to 1.0.0

Bumps mypy-extensions from 0.4.3 to 1.0.0.

Commits

• 4161db8 Bump version to 1.0.0
• c2ff5b8 Require Python 3.5+ in setup.py and setup.cfg (#34)
• d48060d Don't describe mypy_extensions as experimental in the description (#32)
• 53c8777 Add mypyc native int types i64, i32, i16 and u8 (#31)
• 0a0adae Document development status as stable and prepare for 1.0 release (#30)
• 2874924 Drop Python 2 support (#29)
• 1c3f2ed Fix test_typeddict_errors test case on Python 3.11 (#28)
• 7c4d002 Add Python 3.8 to 3.11 to tox envs (#27)
• 6565d3b Add 3.10 and 3.11 to classifiers (#26)
• c02c54f Drop Python 3.4 support (#25)
• Additional commits viewable in compare view

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