- updated ufoLib dependency to v2.2.1
- modified ufoLib.UFOReader instantiation in order to continue to support validation on UFO file reads after the ufoLib dependency changes
- modified ufoLib.glifLib.GlyphSet instantiation in order to continue to support validation on UFO file reads after the ufoLib dependency changes
- added Python 3.7 interpreter testing in CI testing settings files
- eliminated Python 3.4 interpreter testing in CI testing settings files