update mapbox-upload to 4.2.x, #1525
update mapbox-upload to 4.2.x, #1525

mapbox/mapbox-studio-classic,mapbox/mapbox-studio,mapbox/mapbox-studio-classic,mapbox/mapbox-studio-classic,mapbox/mapbox-studio,mapbox/mapbox-studio,Zhao-Qi/mapbox-studio-classic,mapbox/mapbox-studio-classic,mapbox/mapbox-studio,Zhao-Qi/mapbox-studio-classic,Zhao-Qi/mapbox-studio-classic,mapbox/mapbox-studio,Zhao-Qi/mapbox-studio-classic,Zhao-Qi/mapbox-studio-classic