New Feature: Implemented NewType type support.
Enhancement: Improved type analyzer in case where class is passed in a context where a function is expected. The analyzer now synthesizes a function that corresponds to the class's constructor and/or init routine.
Enhancement: Added function documentation support in signature provider.
Enhancement: Made a bunch of suggested improvements to the completion provider including support for built-in types and selection details.
Bug Fix: Fixed bug in docstring processing where the entire docstring is on a single line.
Bug Fix: Fixed bug in type analyzer. It was incorrectly reporting that "yield" statements were not allowed in async functions. Only "yield from" should be flagged as errors.