Add types, tests, docs

index.d.ts

@@ -47,7 +47,7 @@ export type Options<ReturnType> = {
 
 	If you do a custom error, it's recommended to sub-class `pTimeout.TimeoutError`.
 	*/
-	message?: string | Error;
+	message?: string | Error | false;
 
 	/**
 	Custom implementations for the `setTimeout` and `clearTimeout` functions.

readme.md

@@ -50,10 +50,10 @@ Passing `Infinity` will cause it to never time out.
 
 ##### message
 
-Type: `string | Error`\
+Type: `string | Error | false`\
 Default: `'Promise timed out after 50 milliseconds'`
 
-Specify a custom error message or error.
+Specify a custom error message or error. If you supply `false`, the promise will resolve successfully instead of rejecting.
 
 If you do a custom error, it's recommended to sub-class `pTimeout.TimeoutError`.
 

test.js

@@ -35,6 +35,13 @@ test('rejects after timeout', async t => {
 	await t.throwsAsync(pTimeout(delay(200), {milliseconds: 50}), {instanceOf: TimeoutError});
 });
 
+test('resolves after timeout with message:false', async t => {
+	t.is(
+		await pTimeout(delay(200), {milliseconds: 50, message: false}),
+		undefined,
+	);
+});
+
 test('rejects before timeout if specified promise rejects', async t => {
 	await t.throwsAsync(pTimeout(delay(50).then(() => {
 		throw fixtureError;