* Adds Event type to multiprocessing
* Add event and context stub to multiprocessing stub. Updates per recommendations.
* Adding missing newline at EOF.
* Stubbing just BaseContext and not any of the member functions.
* Fix flake8 extra line.
* Fix comment.
* Add todo for BaseContext, make ctx of Any type, and remove multiprocessing.context
* Fix type declarations for multiprocessing.pool.ThreadPool
The existing incomplete type declarations were replaced by a copy of
multiprocessing.Pool's declarations, suitably modified.
Fixes#683.
* Change iterable type to Iterable[Iterable[Any]] in starmap
multiprocessing.Pool and multiprocessing.pool.ThreadPool have starmap
and related methods, where the iterable argument is expected to yield
iterables. The type declarations now reflect this.
