[weixain-app] fix return types
[weixain-app] fix return types

georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,magny/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,borisyankov/DefinitelyTyped,magny/DefinitelyTyped,dsebastien/DefinitelyTyped,markogresak/DefinitelyTyped,mcliment/DefinitelyTyped