[workerpool] Fix the return type of workerpool.Promise.catch. (#45163)
[workerpool] Fix the return type of workerpool.Promise.catch. (#45163)


markogresak/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped