PyPy test failures

On the conda-forge feedstock, the tests for PyPy on Windows are skipping a few failures:

test_frechet_distance_densify crashes, and test_dump_binary_load_hex fails with the below error:

__________________________ test_dump_binary_load_hex __________________________

some_point = <POINT (1.2 3.4)>
tmpdir = local('C:\\Users\\VssAdministrator\\AppData\\Local\\Temp\\pytest-of-VssAdministrator\\pytest-0\\test_dump_binary_load_hex0')

    def test_dump_binary_load_hex(some_point, tmpdir):
        """Asserts that reading a text file (hex mode) as binary fails."""
        file = tmpdir.join("test.wkb")
        with open(file, "wb") as file_pointer:
            dump(some_point, file_pointer)
    
        # TODO(shapely-2.0) on windows this doesn't seem to error with pygeos,
        # but you get back a point with garbage coordinates
        if sys.platform == "win32":
            with open(file, "r") as file_pointer:
>               restored = load(file_pointer, hex=True)

..\_test_env\lib\site-packages\shapely\tests\legacy\test_wkb.py:153: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
..\_test_env\lib\site-packages\shapely\wkb.py:28: in load
    data = fp.read()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <encodings.utf_8.IncrementalDecoder object at 0x0000022be5a47bb0>
input = b'\x01\x01\x00\x00\x00333333\xf3?333333\x0b@', final = True

    def decode(self, input, final=False):
        # decode input (taking the buffer into account)
        data = self.buffer + input
>       (result, consumed) = self._buffer_decode(data, self.errors, final)
E       UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf3 in position 11: invalid continuation byte

..\_test_env\Lib\codecs.py:322: UnicodeDecodeError

Reproduce test_frechet_distance_densify and test_dump_binary_load_hex under PyPy on Windows. Read the traceback locations in shapely/tests/legacy/test_wkb.py and shapely/wkb.py, then trace the platform-specific behavior. Done means both tests pass without being skipped in that environment.