improved souncloud to retrieve info even it the status code is 503

Author: oscarotero

src/Adapters/Soundcloud.php

@@ -15,7 +15,7 @@ class Soundcloud extends Webpage implements AdapterInterface
      */
     public static function check(Request $request)
     {
-        return $request->isValid() && $request->match([
+        return $request->isValid([200, 503]) && $request->match([
             'https?://soundcloud.com/*',
             'https?://m.soundcloud.com/*',
         ]);

tests/ImagesBlacklistTest.php

@@ -7,7 +7,7 @@ public function testPlainText()
         $this->assertEmbed(
             'https://github.com/oscarotero/Embed',
             [
-                'image' => 'https://assets-cdn.github.com/images/spinners/octocat-spinner-32.gif',
+                'image' => 'https://assets-cdn.github.com/images/spinners/octocat-spinner-32-EAF2F5.gif',
             ], [
                 'adapter' => [
                     'config' => [
@@ -25,7 +25,7 @@ public function testPlainUrlMatch()
         $this->assertEmbed(
             'https://github.com/oscarotero/Embed',
             [
-                'image' => 'https://assets-cdn.github.com/images/spinners/octocat-spinner-32.gif',
+                'image' => 'https://assets-cdn.github.com/images/spinners/octocat-spinner-32-EAF2F5.gif',
             ], [
                 'adapter' => [
                     'config' => [

tests/SoundcloudTest.php

@@ -32,21 +32,6 @@ public function testTwo()
     }
 
     public function testThree()
-    {
-        $this->assertEmbed(
-            'https://soundcloud.com/calumfoad/sets/flaws-ep-stream',
-            [
-                'title' => 'Flaws EP by Calum Foad',
-                'description' => '20 year old singer/songwriter from Reading.',
-                'type' => 'rich',
-                'code' => '<iframe width="100%" height="450" scrolling="no" frameborder="no" src="https://w.soundcloud.com/player/?visual=true&url=https%3A%2F%2Fapi.soundcloud.com%2Fplaylists%2F46025307&show_artwork=true"></iframe>',
-                'providerName' => 'SoundCloud',
-                'providerUrl' => 'https://soundcloud.com',
-            ]
-        );
-    }
-
-    public function testFour()
     {
         $this->assertEmbed(
             'https://soundcloud.com/ididthat-1/lowe-ct-cape-times-world-cup',