Refactor Virtus::Attribute::Collection#coerce
Refactor Virtus::Attribute::Collection#coerce

* The names of the arguments passed into #coerce_and_append_member isn't an
  important detail for #coerce to know about, so just pass in all the args as-is

hapiben/virtus,baojjeu/virtus,kristianmandrup/virtus,faucct/virtus,dslh/virtus,solnic/virtus,artemeff/virtus,lgierth/virtus,mallikarjunayaddala/virtus,reevoo/virtus,macressler/virtus,XescuGC/virtus,nuclearsandwich/virtus,JustMikey/virtus