Tests fail with Python 3.12

[andrewshadura]

One of the tests verifies the exact text of an exception matches a string literal; however, 3.12 changed that text, so it no longer matches.

=================================== FAILURES ===================================
_________________________ TestConfig.test_load_invalid _________________________

self = <tests.test_receive.TestConfig object at 0x7f307b6562d0>
tmp_path = PosixPath('/tmp/pytest-of-user42/pytest-19/test_load_invalid0')

    def test_load_invalid(self, tmp_path):
        with pytest.raises(receive.OTReceiveConfigError) as excinfo:
            receive.OTReceiveConfig.load([True])
>       assert str(excinfo.value) == (
            'expected str, bytes or os.PathLike object, not bool'
        )
E       assert "argument sho...r, not 'bool'" == 'expected str...ect, not bool'
E         - expected str, bytes or os.PathLike object, not bool
E         + argument should be a str or an os.PathLike object where __fspath__ returns a str, not 'bool'

tests/test_receive.py:818: AssertionError

It would be great if the could be fixed in a manner preserving compatibility with the earlier Python versions as well.

[dbnicholson]

Ah, that was silly to match the whole exception string. I think this can be changed to a simple match on PathLike since that's all it's trying to determine and I feel like that's less likely to change.