parse: Add "Extended" to _WIDTH_NAMES
parse: Add "Extended" to _WIDTH_NAMES

Fixes #https://github.com/googlefonts/fontbakery/issues/2701#issuecomment-585551353

googlefonts/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,moyogo/fontbakery,graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery