Typing support

Runtype supports a wide-range of types and typing constructs, however full-support is still work in progress.

For now, some constructs are available for validation, but not for dispatch.

Here is the detailed list:

Types / Constructs	Validation	Dispatch
Primitives (None, bool, float, int, str, etc.)	✔	✔
Date primitives (datetime, date, time, timedelta)	✔	✔
Containers, non-generic (list, tuple, dict)	✔	✔
Callable, non-generic (callable)	✔	✔
abc.Set, abc.MutableMapping, etc.	✔	✔
typing.AbstractSet	✔	✔
typing.Any	✔	✔
typing.Union, Optional	✔	✔
typing.Type (Type[x])	✔	✔
typing.Literal	✔	✔
Generic containers (list[x], tuple[x], dict[x])	✔	TODO
Infinite tuple (tuple[x, …])	✔	TODO
Generic callable	TODO	TODO
typing.IO	TODO	TODO
TypeVar	TODO	TODO
Protocol	TODO	TODO