v2.12.1

v2.12.1 is a maintenance release with the following fixes:

• Restored macOS binaries compatibility with macOS 13
• libversion() now returns the string/integer tuple for varients on version -- use version() for string only response
• Added Python 3.14 support and dropped 3.7 support -- Free-threaded capabilities not fully supported yet
• Fixed use.schema.id in sr.lookup_schema()
• Removed tomli dependency from standard (non-documentation) requirements
• Fixed experimental asyncio example files to correctly use new capabilities
• Fixed invalid argument error on schema lookups on repeat requests
• Fixed documentation generation and added error checks for builds to prevent future breaks