Python 3.13 adds new class attributes: __firstlineno__ and __static_attributes__, resulting in failing test_reserved_attributes

[befeleme]

The tests fail with Python 3.13.0b1 with the traceback below.

per https://docs.python.org/dev/whatsnew/3.13.html:

• __firstlineno__ is the line number of the first line of the class definition
• __static_attributes__ is a tuple of names of attributes of this class which are accessed through self.X from any function in its body. For munch, the value is ('update', '__class__'), but I'm not entirely sure it's fixed.

=================================== FAILURES ===================================
__________________ test_reserved_attributes[__firstlineno__] ___________________

attrname = '__firstlineno__'

    @pytest.mark.parametrize("attrname", dir(Munch))
    def test_reserved_attributes(attrname):
        # Make sure that the default attributes on the Munch instance are
        # accessible.
    
        taken_munch = Munch(**{attrname: 'abc123'})
    
        # Make sure that the attribute is determined as in the filled collection...
        assert attrname in taken_munch
    
        # ...and that it is available using key access...
        assert taken_munch[attrname] == 'abc123'
    
        # ...but that it is not available using attribute access.
        attr = getattr(taken_munch, attrname)
        assert attr != 'abc123'
    
        empty_munch = Munch()
    
        # Make sure that the attribute is not seen contained in the empty
        # collection...
        assert attrname not in empty_munch
    
        # ...and that the attr is of the correct original type.
        attr = getattr(empty_munch, attrname)
        if attrname == '__doc__':
            assert isinstance(attr, str)
        elif attrname in ('__hash__', '__weakref__'):
            assert attr is None
        elif attrname == '__module__':
            assert attr == 'munch'
        elif attrname == '__dict__':
            assert attr == {}
        else:
>           assert callable(attr)
E           assert False
E            +  where False = callable(35)

tests/test_munch.py:229: AssertionError
_______________ test_reserved_attributes[__static_attributes__] ________________

attrname = '__static_attributes__'

    @pytest.mark.parametrize("attrname", dir(Munch))
    def test_reserved_attributes(attrname):
        # Make sure that the default attributes on the Munch instance are
        # accessible.
    
        taken_munch = Munch(**{attrname: 'abc123'})
    
        # Make sure that the attribute is determined as in the filled collection...
        assert attrname in taken_munch
    
        # ...and that it is available using key access...
        assert taken_munch[attrname] == 'abc123'
    
        # ...but that it is not available using attribute access.
        attr = getattr(taken_munch, attrname)
        assert attr != 'abc123'
    
        empty_munch = Munch()
    
        # Make sure that the attribute is not seen contained in the empty
        # collection...
        assert attrname not in empty_munch
    
        # ...and that the attr is of the correct original type.
        attr = getattr(empty_munch, attrname)
        if attrname == '__doc__':
            assert isinstance(attr, str)
        elif attrname in ('__hash__', '__weakref__'):
            assert attr is None
        elif attrname == '__module__':
            assert attr == 'munch'
        elif attrname == '__dict__':
            assert attr == {}
        else:
>           assert callable(attr)
E           AssertionError: assert False
E            +  where False = callable(('update', '__class__'))

tests/test_munch.py:229: AssertionError