- does not prepend /v4/ to api endpoints like /fonts/v1/ - only prepends it to things starting with /fontstack - solves the problem in #1918 - refs mapbox/mapbox-gl-style-spec#309
- does not prepend /v4/ to api endpoints like /fonts/v1/ - only prepends it to things starting with /fontstack - solves the problem in #1918 - refs mapbox/mapbox-gl-style-spec#309