Add types for map functions with promise return (#38294)
Add types for map functions with promise return (#38294)

When no callback is passed, the function should return a promise (since version 3.0.0)
https://github.com/caolan/async/blob/master/CHANGELOG.md#v300
markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped