#3764 refactor: Update singerlib catalog classes type annotations to accept a more generic mapping type instead of `dict` Pull request opened by edgarrmondragon SSIA Summary by Sourcery Accept generic mapping types throughout Singer catalog and schema parsing APIs. Enhancements: • Broaden Singer catalog and schema APIs to accept generic mapping inputs instead of requiring concrete dictionaries. • Allow tap catalog initialization from any mapping-compatible catalog object. meltano/sdk