chore: define compressionSupported

Author: loks0n

src/Http/Http.php

@@ -56,7 +56,7 @@ class Http extends Base
      */
     protected bool $compression = false;
     protected int $compressionMinSize = Http::COMPRESSION_MIN_SIZE_DEFAULT;
-    protected mixed $compressionSupported;
+    protected mixed $compressionSupported = [];
 
     /**
      * Http

src/Http/Response.php

@@ -260,7 +260,7 @@ abstract class Response
     /**
      * @var mixed
      */
-    protected mixed $compressionSupported;
+    protected mixed $compressionSupported = [];
 
     /**
      * Response constructor.