Runtype: Runtime Type Validation and Multiple Dispatch

Runtype is a Python library providing utilities for fast run-time type validation and multiple dispatch. It enhances Python's built-in `dataclasses` with runtime type validation and automatic casting, offers smart alternatives to `isinstance` and `issubclass` for complex types, and implements a performant multiple-dispatch decorator. The library is currently at version 0.5.3, with a regular release cadence addressing bug fixes and performance improvements.