Relaxed Resolver Raising Error

Hi @c0fec0de, thanks for the fantastic library! Running v`2.12.1` installed via conda/mamba and getting the following error: ```python top = Node("top", parent=None) sub0 = Node("sub0", parent=top) relaxedresolver = Resolver('name', relax=True) relaxedresolver.get(top, "sub2") # Returns None (meets expectations) relaxedresolver.get(top, "sub2/sub3") *** AttributeError: 'NoneType' object has no attribute 'children' ``` I would have expected from the docs that this return `None` because of the relaxed resolution? Thanks again!