The question:

 guile -c '(import (sortsmill)(rnrs)(ice-9 pretty-print)) (call-with-values (lambda () (ufo:read-metainfo "/home/trashman/fontforge/fontforge/build/Oswald-100-cyrillic.ufo")) (lambda args (pretty-print args)))'

The answer:

(((creator . "org.robofab.ufoLib")
  (formatVersion . 2)))