v12.0

• add official support for MS SQL Server with pymssql.
• pass misc parameters to cursor in generic adapter.
• further improve typing to please pyright.
• minor doc fixes…
• improve one error message.
• reduce verbosity when overriding an adapter.
• refactor tests, simplifying the structure and adding over 50 tests. in particular, schema creation now relies on aiosql features instead of using driver capabilities directly.