Fixed return type for FilesystemInterface[update,updateStream]
Fixed return type for FilesystemInterface[update,updateStream]

dstockto/flysystem,farmisen/flysystem,dshafik/flysystem,hannesvdvreken/flysystem,rossriley/flysystem,mhlavac/flysystem,mapyo/flysystem,twistor/flysystem,twistor/flysystem,sohelrana820/flysystem,sachintaware/flysystem,mhlavac/flysystem,barryvdh/flysystem,Amrit01/flysystem,oswaldderiemaecker/flysystem,CarsonF/flysystem,nao-pon/flysystem