Fix #67 Use GMT in expires cookie date. Reduced date to stay in the century.

Fix #67 Use 2 digit year in cookie expires date to support HHVM.

Author: Peter Bouwdewijn

spec/CookiePluginSpec.php

@@ -2,15 +2,15 @@
 
 namespace spec\Http\Client\Plugin;
 
-use Http\Promise\FulfilledPromise;
 use Http\Message\Cookie;
 use Http\Message\CookieJar;
+use Http\Promise\FulfilledPromise;
 use Http\Promise\Promise;
+use PhpSpec\ObjectBehavior;
+use Prophecy\Argument;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\UriInterface;
-use PhpSpec\ObjectBehavior;
-use Prophecy\Argument;
 
 class CookiePluginSpec extends ObjectBehavior
 {
@@ -146,7 +146,9 @@ function it_saves_cookie(RequestInterface $request, ResponseInterface $response,
 
         $response->hasHeader('Set-Cookie')->willReturn(true);
         $response->getHeader('Set-Cookie')->willReturn([
-            'cookie=value; expires=Wednesday, 31-Mar-2116 06:34:54 UTC; Max-Age=60; path=/; domain=test.com; secure; HttpOnly',
+            sprintf(
+                'cookie=value; expires=Tuesday, 31-Mar-99 07:42:12 GMT; Max-Age=60; path=/; domain=test.com; secure; HttpOnly'
+            )
         ]);
 
         $request->getUri()->willReturn($uri);