Only run regression checks if family is on GF
Only run regression checks if family is on GF

There was a bug in the implementation that was causing HTTP Errors
 since it was attempting to fetch the files even though they're not
 listed on the gfonts API
(fix issue #1995)

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