Fix `filename` property name for object given to the `onCompleted` option (#157)
Fix `filename` property name for object given to the `onCompleted` option (#157)

Co-authored-by: Sindre Sorhus <734af6fcbad65feee4fc3cad1b3f8a05746ffb9a@gmail.com>
sindresorhus/electron-dl,sindresorhus/electron-dl,sindresorhus/electron-dl