ALTER EXTENSION trunklet UPDATE now works from 0.2.0. Previously there was no update path from 0.2.0.
Updated installs now also match a fresh install: the language__get() debug message that a fresh 0.3.3 install has is added by 0.3.3—stable and was retroactively added to the already-released 0.3.2—0.3.3 update script.