Hello! Just trying to run through some examples, I get an error for the following snippet from the docs using the latest version of bioservices (1.11.2): https://buildmedia.readthedocs.org/media/pdf/bioservices/latest/bioservices.pdf

>>> from bioservices import UniChem
>>> uni = UniChem()
>>> mapping = uni.get_mapping("kegg_ligand", "chembl")

I get the following stacktrace:

AttributeError: 'UniChem' object has no attribute 'get_mapping'

Any thoughts? Seems like a simple call.... thanks!