- Update to v0.20.1
* Fix documentation building: upgrade to Sphinx 5.0.
* Fix broken user guide links in API documentation.
- Version 0.20
* Add keyword-only neato_no_op argument to .render(), .pipe(),
and stand-alone graphviz.render() and graphviz.pipe().
* When building a Graph or Digraph, warn about an expected DOT
syntax error in rendering when passing a string that ends with
an odd number of backslashes (e.g. invalid dot.node('spam',
label='\\') instead of correct ..., label=r'\\' for a node
labled as a backslash).
* Increase visibility of graphviz.escape() in the documentation.
- Version 0.19.2
* Drop Python 3.6 support (end of life 23 Dec 2021).
* Fix ExecutableNotFound and CalledProcessError in
graphviz.__all__.
* Better document 0.18 change of behaviour for the body
argument/attribute (lines need to include their final newline).
- drop python-graphviz-pytest.patch