stop tagging composition-latest-0 and composition-latest-2

[EverlastingBugstopper]

we should use a latest.json file in the root of the repo that keeps track of the latest released versions of each plugin. hitting the same endpoint as git ls-remote (to get the info from this tag) includes some ugly code in orbiter that we could remove if we replace with a json file. additionally it will be easier to debug and easier to update.