Merge branch '6.4' into 7.0

* 6.4:
  fix compatibility with Redis Relay 0.8.1
  use more entropy with uniqid()
  [Cache] Improve `dbindex` DSN parameter parsing
  Support for PHP-CS-Fixer's parallel runner
  use more entropy with uniqid()
  [Contracts][HttpClient] Skip tests when zlib's `ob_gzhandler()` doesn't exist

Author: xabbuh

Tests/HttplugClientTest.php

@@ -37,6 +37,9 @@ public static function tearDownAfterClass(): void
         TestHttpServer::stop();
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendRequest()
     {
         $client = new HttplugClient(new NativeHttpClient());
@@ -51,6 +54,9 @@ public function testSendRequest()
         $this->assertSame('HTTP/1.1', $body['SERVER_PROTOCOL']);
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendAsyncRequest()
     {
         $client = new HttplugClient(new NativeHttpClient());

Tests/Psr18ClientTest.php

@@ -33,6 +33,9 @@ public static function tearDownAfterClass(): void
         TestHttpServer::stop();
     }
 
+    /**
+     * @requires function ob_gzhandler
+     */
     public function testSendRequest()
     {
         $factory = new Psr17Factory();