Add missing currentTarget event property
Add missing currentTarget event property

Closes #9899
jraymakers/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,arma-gast/DefinitelyTyped,slavomirvojacek/adbrain-typescript-definitions,psnider/DefinitelyTyped,newclear/DefinitelyTyped,alexdresko/DefinitelyTyped,nainslie/DefinitelyTyped,danfma/DefinitelyTyped,syuilo/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,benishouga/DefinitelyTyped,dsebastien/DefinitelyTyped,rolandzwaga/DefinitelyTyped,zuzusik/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,schmuli/DefinitelyTyped,mcrawshaw/DefinitelyTyped,amanmahajan7/DefinitelyTyped,martinduparc/DefinitelyTyped,psnider/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,martinduparc/DefinitelyTyped,Penryn/DefinitelyTyped,yuit/DefinitelyTyped,jraymakers/DefinitelyTyped,arusakov/DefinitelyTyped,chrootsu/DefinitelyTyped,paulmorphy/DefinitelyTyped,benishouga/DefinitelyTyped,scriby/DefinitelyTyped,shlomiassaf/DefinitelyTyped,hellopao/DefinitelyTyped,paulmorphy/DefinitelyTyped,georgemarshall/DefinitelyTyped,gcastre/DefinitelyTyped,nainslie/DefinitelyTyped,use-strict/DefinitelyTyped,chrootsu/DefinitelyTyped,newclear/DefinitelyTyped,mattblang/DefinitelyTyped,chrismbarr/DefinitelyTyped,minodisk/DefinitelyTyped,isman-usoh/DefinitelyTyped,johan-gorter/DefinitelyTyped,DzmitryDulko/DefinitelyTyped,benishouga/DefinitelyTyped,ashwinr/DefinitelyTyped,slavomirvojacek/DefinitelyTyped,QuatroCode/DefinitelyTyped,hellopao/DefinitelyTyped,schmuli/DefinitelyTyped,damianog/DefinitelyTyped,progre/DefinitelyTyped,gandjustas/DefinitelyTyped,ashwinr/DefinitelyTyped,gcastre/DefinitelyTyped,borisyankov/DefinitelyTyped,hellopao/DefinitelyTyped,HPFOD/DefinitelyTyped,donnut/DefinitelyTyped,isman-usoh/DefinitelyTyped,GiedriusGrabauskas/DefinitelyTyped,georgemarshall/DefinitelyTyped,rcchen/DefinitelyTyped,smrq/DefinitelyTyped,donnut/DefinitelyTyped,rcchen/DefinitelyTyped,arusakov/DefinitelyTyped,florentpoujol/DefinitelyTyped,alvarorahul/DefinitelyTyped,syuilo/DefinitelyTyped,shlomiassaf/DefinitelyTyped,dsebastien/DefinitelyTyped,frogcjn/DefinitelyTyped,psnider/DefinitelyTyped,one-pieces/DefinitelyTyped,Ptival/DefinitelyTyped,damianog/DefinitelyTyped,QuatroCode/DefinitelyTyped,yuit/DefinitelyTyped,subash-a/DefinitelyTyped,aciccarello/DefinitelyTyped,AgentME/DefinitelyTyped,AgentME/DefinitelyTyped,micurs/DefinitelyTyped,jimthedev/DefinitelyTyped,sledorze/DefinitelyTyped,frogcjn/DefinitelyTyped,YousefED/DefinitelyTyped,benliddicott/DefinitelyTyped,subash-a/DefinitelyTyped,smrq/DefinitelyTyped,scriby/DefinitelyTyped,jimthedev/DefinitelyTyped,pocesar/DefinitelyTyped,alexdresko/DefinitelyTyped,mattblang/DefinitelyTyped,georgemarshall/DefinitelyTyped,pocesar/DefinitelyTyped,martinduparc/DefinitelyTyped,aciccarello/DefinitelyTyped,abbasmhd/DefinitelyTyped,slavomirvojacek/adbrain-typescript-definitions,johan-gorter/DefinitelyTyped,rolandzwaga/DefinitelyTyped,nycdotnet/DefinitelyTyped,daptiv/DefinitelyTyped,Ptival/DefinitelyTyped,DzmitryDulko/DefinitelyTyped,arma-gast/DefinitelyTyped,abbasmhd/DefinitelyTyped,progre/DefinitelyTyped,minodisk/DefinitelyTyped,amanmahajan7/DefinitelyTyped,chrismbarr/DefinitelyTyped,xStrom/DefinitelyTyped,magny/DefinitelyTyped,magny/DefinitelyTyped,arusakov/DefinitelyTyped,borisyankov/DefinitelyTyped,AbraaoAlves/DefinitelyTyped,mcliment/DefinitelyTyped,markogresak/DefinitelyTyped,florentpoujol/DefinitelyTyped,danfma/DefinitelyTyped,AgentME/DefinitelyTyped,schmuli/DefinitelyTyped,aciccarello/DefinitelyTyped,nycdotnet/DefinitelyTyped,xStrom/DefinitelyTyped,sledorze/DefinitelyTyped,zuzusik/DefinitelyTyped,Penryn/DefinitelyTyped,amir-arad/DefinitelyTyped,AgentME/DefinitelyTyped,abner/DefinitelyTyped,alvarorahul/DefinitelyTyped,zuzusik/DefinitelyTyped,abner/DefinitelyTyped,pocesar/DefinitelyTyped,use-strict/DefinitelyTyped,YousefED/DefinitelyTyped,georgemarshall/DefinitelyTyped,laurentiustamate94/DefinitelyTyped,gandjustas/DefinitelyTyped,mcrawshaw/DefinitelyTyped,jimthedev/DefinitelyTyped,HPFOD/DefinitelyTyped