Add Pause; update for timer watcher changes in loop

lib/Pause.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Amp\Awaitable;
+
+use Interop\Async\Awaitable;
+use Interop\Async\Loop;
+
+class Pause implements Awaitable {
+    use Internal\Placeholder;
+
+    /**
+     * @param int $time Milliseconds before succeeding the awaitable.
+     * @param mixed $value Succeed the awaitable with this value.
+     */
+    public function __construct($time, $value = null)
+    {
+        Loop::delay($time, function () use ($value) {
+            $this->resolve($value);
+        });
+    }
+}

lib/functions.php

@@ -33,7 +33,6 @@ function coroutine(callable $worker) {
 function rethrow(Awaitable $awaitable) {
     $awaitable->when(function ($exception) {
         if ($exception) {
-            /** @var \Throwable|\Exception $exception */
             throw $exception;
         }
     });
@@ -135,9 +134,9 @@ function capture(Awaitable $awaitable, callable $functor) {
 function timeout(Awaitable $awaitable, $timeout) {
     $deferred = new Deferred;
 
-    $watcher = Loop::delay(function () use ($deferred) {
+    $watcher = Loop::delay($timeout, function () use ($deferred) {
         $deferred->fail(new Exception\TimeoutException);
-    }, $timeout);
+    });
 
     $onResolved = function () use ($awaitable, $deferred, $watcher) {
         Loop::cancel($watcher);
@@ -149,23 +148,6 @@ function timeout(Awaitable $awaitable, $timeout) {
     return $deferred->getAwaitable();
 }
 
-/**
- * Returns an awaitable that succeeds after $time elapses.
- *
- * @param int $time
- *
- * @return \Interop\Async\Awaitable
- */
-function pause($time) {
-    $deferred = new Deferred;
-
-    Loop::delay(function () use ($deferred) {
-        $deferred->resolve();
-    }, $time);
-
-    return $deferred->getAwaitable();
-}
-
 /**
  * Returns a awaitable that calls $promisor only when the result of the awaitable is requested (e.g., then() or
  * done() is called on the returned awaitable). $promisor can return a awaitable or any value. If $promisor throws