Sphinx-autodoc-typehints

- Rewrote the annotation formatting logic (fixes Python 3.5.2 compatibility regressions and an `AttributeError`
regression introduced in v1.9.0)
- Fixed decorator classes not being processed as classes

- Added support for [typing_extensions](https://pypi.org/project/typing-extensions/)
- Added the `typehints_document_rtype` option (PR by Simon-Martin Schröder)
- Fixed metaclasses as annotations causing `TypeError`
- Fixed rendering of `typing.Literal`
- Fixed OSError when generating docs for SQLAlchemy mapped classes
- Fixed unparametrized generic classes being rendered with their type parameters (e.g. `Dict[~KT, ~VT]`)

- Fixed regression which caused `TypeError` or `OSError` when trying to set annotations due to PR 87
- Fixed unintentional mangling of annotation type names
- Added proper `:py:data` targets for `NoReturn`, `ClassVar` and `Tuple`
- Added support for inline type comments (like `(int, str) -> None`) (PR by Bernát Gábor)
- Use the native AST parser for type comment support on Python 3.8+

- Dropped support for Python 3.4
- Fixed unwrapped local functions causing errors (PR by Kimiyuki Onaka)
- Fixed `AttributeError` when documenting the `__init__()` method of a data class
- Added support for type hint comments (PR by Markus Unterwaditzer)
- Added flag for rendering classes with their fully qualified names (PR by Holly Becker)

- Fixed `TypeError` when formatting annotations from a class that inherits from a concrete generic type (report and
tests by bpeake-illuscio)
- Added support for `typing_extensions.Protocol` (PR by Ian Good)
- Added support for `typing.NewType` (PR by George Leslie-Waksman)

- Emit a warning instead of crashing when an unresolvable forward reference is encountered in type annotations