[doc] fix typo

Include tests and docs in sdists

These are useful to downstreams, such as linux packagers.

Activating Open Collective

add new TypedName node

Use new method to avoid pypandoc warning

This fixes the following deprecation warning:
```
setup.py:8: DeprecationWarning: Due to possible ambiguity, 'convert()' is deprecated. Use 'convert_file()'  or 'convert_text()'.
  read_md = lambda f: convert(f, 'rst')
```