Pygccxml

-------------

1. Drop support for `Python 3.6`

2. Add official support for `Python 3.9`, `Python 3.10`, `Python 3.11`

3. Replace `setup.py` by `pyproject.toml`

-------------

1. Drop support for `Python 3.5`

2. Make type equivalence check for string and ostream more robust (`is_std_string`, `is_std_wstring`, `is_std_ostream`, `is_std_wostream`)

3. Skip GCC's __va_list fields on AArch644

4. Add search_path arg to `find_xml_generator

5. Publish pygccxml as source distribution too

-------------

1. Fix issue introduced by 2.2.0 where cflags are not passed
to config objects properly.

-------------

1. Add `ccflags` config parameter. Castxml removes any definitions of its
pre-defined macros (e.g. -fopenmp). The `ccflags` option allows users to
override this behavior.

2. Add an example jupyter notebook for binder

3. Add declaration object for deprecation message

4. Update release documentation

-------------

1. `create_temp_file_name`: remove deprecated `dir` argument

2. Warn if "include directories" do not exist.

3. Use "overrides" information from CastXML

4. Add comment parsing from CastXML

-------------

1. Minor description and doc updates for release uploads