It should still work, but you need to extend the PLUGIN_API_VERSIONS like this:
["0.9.0", "0.10", "0.15", "0.16", "2.0", "2.1", "2.2"]
See also the discussion for Categorizing lossless music - #6 by outsidecontext
Sorry, I was not quite clear about this in my first post. Since you had basically the same question as in the other thread at around the same time I for some reason assumed you had also put in the question on the other thread.