🛠️refactor(testing) improve code quality in Assert and TestResponse

Author: huangdijia

src/Assert.php

@@ -24,7 +24,7 @@ abstract class Assert extends PHPUnit
     /**
      * Asserts that an array has a specified subset.
      *
-     * @param array|ArrayAccess $subset
+     * @param array|ArrayAccess|mixed $subset
      * @param array|ArrayAccess $array
      */
     public static function assertArraySubset($subset, $array, bool $checkForIdentity = false, string $msg = ''): void

src/Http/TestResponse.php

@@ -675,7 +675,7 @@ public function getStatusCode(): int
      */
     public function streamedContent()
     {
-        if (! is_null($this->streamedContent)) {
+        if (! is_null($this->streamedContent)) { /* @phpstan-ignore-line */
             return $this->streamedContent;
         }