add 4 missing functions
add 4 missing functions

added functions registerFormat, unregisterFormat, getRegisteredFormats,
getDefaultOptions

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