ttfautohint doesn't work on pypy3, fails with ctypes errors

[anthrotype]

Getting the following test failures on pypy3.8 on Mac. I'll need to take some time to investigate this. In the meantime, I'll probably disable ttfautohint-py in fontmake for pypy3.

tests/test_info.py::test_info_name_id_5[1-0-no-previous-info-detailed] FAILED                                                                 [ 10%]

===================================================================== FAILURES ======================================================================
________________________________________________ test_info_name_id_5[1-0-no-previous-info-detailed] _________________________________________________

self = <class 'ctypes.py_object'>, value = {}

    def from_param(self, value):
        if isinstance(value, self):
            return value
        try:
>           as_parameter = value._as_parameter_
E           AttributeError: 'dict' object has no attribute '_as_parameter_'

../../Downloads/pypy3.8-v7.3.7-osx64/lib/pypy3.8/_ctypes/basics.py:56: AttributeError

During handling of the above exception, another exception occurred:

plat_id = 1, enc_id = 0, detailed_info = True, font_version = 'Version 1.000', previous_info = '', appendix = ''

    @pytest.mark.parametrize(
        "detailed_info",
        [True, False],
        ids=["detailed", "no_detailed"]
    )
    @pytest.mark.parametrize(
        "font_version, previous_info, appendix",
        [
            ("Version 1.000", "", ""),
            ("Version 1.000", "; ttfautohint (v1.5)", ""),
            ("Version 1.000", "; ttfautohint (v1.5)", "; foo bar"),
        ],
        ids=[
            "no-previous-info",
            "previous-info-last",
            "previous-info-not-last",
        ]
    )
    @pytest.mark.parametrize(
        "plat_id, enc_id",
        [(1, 0), (3, 1), (3, 10)],
    )
    def test_info_name_id_5(plat_id, enc_id, detailed_info, font_version,
                            previous_info, appendix):
        info_string = TEST_INFO_DETAILED if detailed_info else TEST_INFO
>       info_data = InfoData(info_string)

tests/test_info.py:95:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.venv-pypy/lib/pypy3.8/site-packages/ttfautohint/info.py:108: in __init__
    super(InfoData, self).__init__(info_string, family_suffix, family_data)
../../Downloads/pypy3.8-v7.3.7-osx64/lib/pypy3.8/_ctypes/structure.py:302: in __init__
    self.__setattr__(name, arg)
../../Downloads/pypy3.8-v7.3.7-osx64/lib/pypy3.8/_ctypes/structure.py:135: in __set__
    cobj = fieldtype.from_param(value)
../../Downloads/pypy3.8-v7.3.7-osx64/lib/pypy3.8/_ctypes/primitive.py:382: in from_param
    return super(SimpleType, self).from_param(value)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <class 'ctypes.py_object'>, value = {}

    def from_param(self, value):
        if isinstance(value, self):
            return value
        try:
            as_parameter = value._as_parameter_
        except AttributeError:
            raise TypeError("expected %s instance instead of %s" % (
>               self.__name__, type(value).__name__))
E           TypeError: expected py_object instance instead of dict