RSMTool 12.0.0

What's Changed

• Python 3.8 and 3.9 are no longer supported since the SKLL dependency was updated to v5.0.1.
• Remove rsmextra and special sections by @desilinguist in #676
• Add type hints (part 1) by @desilinguist in #677
• Add type hints (Part 2) by @desilinguist in #679
• Add type hints (Part 3) by @desilinguist in #681
• Add Type Hints (Part 4) by @desilinguist in #682
• Add Type Hints (Final Part) by @desilinguist in #683
• Fix pandas-related warnings by @desilinguist in #684
• Separate runtime and dev dependencies by @desilinguist in #685

Full Changelog: v11.3.0...v12.0.0