Safer Nexson metadata references: meta() ==> meta
Safer Nexson metadata references: meta() ==> meta

This takes advantage of the support methods and their coercion to arrays where expected, but not guaranteed.

OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree,OpenTreeOfLife/opentree