Updated dependency fontfacegen

[MaxBoeh]

... to be able to append several css / scss / less files into one avoiding overwriting

[MarttiR]

This fixes common errors when using gulp-fontfacegen with .ttf's from Google Fonts, such as the following:

../node_modules/fontfacegen/lib/ttf2svg.js:19
        throw new FontFaceException(
        ^
FontFaceException: svg conversion failed: TypeError: Cannot read property 'getPointCount' of undefined
Your SVG file will probably not be in a working state