Accept PromiseLike object

types/promise.prototype.finally/index.d.ts

@@ -5,7 +5,7 @@
 
 declare global {
     interface Promise<T> {
-        finally<U>(onFinally?: () => U | Promise<U>): Promise<T>;
+        finally<U>(onFinally?: () => U | PromiseLike<U>): Promise<T>;
     }
 }
 

types/promise.prototype.finally/promise.prototype.finally-tests.ts

@@ -7,6 +7,7 @@ var promise = new Promise<Boolean>((resolve, reject) => {
 });
 
 promise.finally(() => {});
+promise.finally(() => <PromiseLike<void>>Promise.resolve());
 promise.then(() => {}, () => {}).finally(() => {});
 promise.catch(() => {}).finally(() => {});