better types for upload callbacks
better types for upload callbacks

mcliment/DefinitelyTyped,psnider/DefinitelyTyped,rcchen/DefinitelyTyped,raijinsetsu/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,paulmorphy/DefinitelyTyped,use-strict/DefinitelyTyped,smrq/DefinitelyTyped,mcrawshaw/DefinitelyTyped,gandjustas/DefinitelyTyped,magny/DefinitelyTyped,Penryn/DefinitelyTyped,AgentME/DefinitelyTyped,nainslie/DefinitelyTyped,schmuli/DefinitelyTyped,newclear/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,rolandzwaga/DefinitelyTyped,magny/DefinitelyTyped,musicist288/DefinitelyTyped,newclear/DefinitelyTyped,shlomiassaf/DefinitelyTyped,amir-arad/DefinitelyTyped,pocesar/DefinitelyTyped,syuilo/DefinitelyTyped,danfma/DefinitelyTyped,DzmitryDulko/DefinitelyTyped,AgentME/DefinitelyTyped,donnut/DefinitelyTyped,alvarorahul/DefinitelyTyped,mattblang/DefinitelyTyped,rcchen/DefinitelyTyped,nycdotnet/DefinitelyTyped,micurs/DefinitelyTyped,HPFOD/DefinitelyTyped,minodisk/DefinitelyTyped,pocesar/DefinitelyTyped,frogcjn/DefinitelyTyped,mattblang/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,paulmorphy/DefinitelyTyped,danfma/DefinitelyTyped,amanmahajan7/DefinitelyTyped,YousefED/DefinitelyTyped,slavomirvojacek/adbrain-typescript-definitions,AgentME/DefinitelyTyped,damianog/DefinitelyTyped,abner/DefinitelyTyped,jraymakers/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,benishouga/DefinitelyTyped,jimthedev/DefinitelyTyped,YousefED/DefinitelyTyped,arusakov/DefinitelyTyped,martinduparc/DefinitelyTyped,damianog/DefinitelyTyped,dsebastien/DefinitelyTyped,xStrom/DefinitelyTyped,use-strict/DefinitelyTyped,laurentiustamate94/DefinitelyTyped,johan-gorter/DefinitelyTyped,gandjustas/DefinitelyTyped,jimthedev/DefinitelyTyped,zuzusik/DefinitelyTyped,yuit/DefinitelyTyped,hellopao/DefinitelyTyped,alexdresko/DefinitelyTyped,borisyankov/DefinitelyTyped,schmuli/DefinitelyTyped,florentpoujol/DefinitelyTyped,rolandzwaga/DefinitelyTyped,Ptival/DefinitelyTyped,chrootsu/DefinitelyTyped,gcastre/DefinitelyTyped,abner/DefinitelyTyped,alexdresko/DefinitelyTyped,QuatroCode/DefinitelyTyped,jimthedev/DefinitelyTyped,donnut/DefinitelyTyped,sledorze/DefinitelyTyped,jraymakers/DefinitelyTyped,benliddicott/DefinitelyTyped,mcrawshaw/DefinitelyTyped,daptiv/DefinitelyTyped,georgemarshall/DefinitelyTyped,sledorze/DefinitelyTyped,shlomiassaf/DefinitelyTyped,smrq/DefinitelyTyped,georgemarshall/DefinitelyTyped,abbasmhd/DefinitelyTyped,psnider/DefinitelyTyped,subash-a/DefinitelyTyped,nainslie/DefinitelyTyped,isman-usoh/DefinitelyTyped,benishouga/DefinitelyTyped,chrismbarr/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,AgentME/DefinitelyTyped,hellopao/DefinitelyTyped,ashwinr/DefinitelyTyped,benishouga/DefinitelyTyped,xStrom/DefinitelyTyped,martinduparc/DefinitelyTyped,progre/DefinitelyTyped,gcastre/DefinitelyTyped,aciccarello/DefinitelyTyped,pocesar/DefinitelyTyped,Ptival/DefinitelyTyped,zuzusik/DefinitelyTyped,ashwinr/DefinitelyTyped,raijinsetsu/DefinitelyTyped,scriby/DefinitelyTyped,georgemarshall/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,johan-gorter/DefinitelyTyped,progre/DefinitelyTyped,schmuli/DefinitelyTyped,subash-a/DefinitelyTyped,markogresak/DefinitelyTyped,arma-gast/DefinitelyTyped,one-pieces/DefinitelyTyped,isman-usoh/DefinitelyTyped,hellopao/DefinitelyTyped,QuatroCode/DefinitelyTyped,scriby/DefinitelyTyped,abbasmhd/DefinitelyTyped,syuilo/DefinitelyTyped,arma-gast/DefinitelyTyped,slavomirvojacek/adbrain-typescript-definitions,minodisk/DefinitelyTyped,georgemarshall/DefinitelyTyped,chrootsu/DefinitelyTyped,HPFOD/DefinitelyTyped,Penryn/DefinitelyTyped,arusakov/DefinitelyTyped,zuzusik/DefinitelyTyped,frogcjn/DefinitelyTyped,yuit/DefinitelyTyped,psnider/DefinitelyTyped,aciccarello/DefinitelyTyped,dsebastien/DefinitelyTyped,arusakov/DefinitelyTyped,aciccarello/DefinitelyTyped,alvarorahul/DefinitelyTyped,amanmahajan7/DefinitelyTyped,martinduparc/DefinitelyTyped,chrismbarr/DefinitelyTyped,DzmitryDulko/DefinitelyTyped,florentpoujol/DefinitelyTyped,nycdotnet/DefinitelyTyped,borisyankov/DefinitelyTyped