Typedargs

- No code changes - just testing the new PyPI publishing pipeline.

- Dropped Python 3.5 support due to EOL
- Added Python 3.9 support

- Bugfix release: fix `docannotate` with python's type-annotated parameters

- Fix docstrings parsing (Issues 47, 34)
- Extend docannotate `show-as` return annotation to support more options (Issue 60)
- Add support of function type annotations in `docannotate`
- Support using `docannotate` on classes to annotate their `__init__()` functions
- Support type classes in type annotations for converting argument from string
and formatting return value
- Support specifying validators in docstrings (Issue 65)
- Support specifying complex return value formatters in docstrings (Issue 61)
- Support recursive function annotations

- Fix deprecation warnings for `imp` and `collections` 86

- Add support for two additional formatters for `bytes` type data: hex and
hexdump. These allow the creation of functions that return binary data but
are still usable from the command line since the binary data will be printed
as either hex format or a normal hex dump such as what disassemblers show
for memory dumps.