Merge branch 'master' into 3.2-merge

Author: limingxinleo

src/Client.php

@@ -184,7 +184,7 @@ public function initRequest(string $method, string $path, array $options = []):
         $uri = (new Uri($this->baseUri . ltrim($path, '/')))->withQuery(http_build_query($query));
 
         $content = http_build_query($params);
-        if ($method == 'POST' && data_get($headers, 'Content-Type') == 'application/json') {
+        if (data_get($headers, 'Content-Type') == 'application/json' && ! empty($json)) {
             $content = json_encode($json, JSON_UNESCAPED_UNICODE);
             $data = $json;
         }

src/Concerns/RunTestsInCoroutine.php

@@ -62,6 +62,7 @@ final protected function runTest(): mixed
             parent::setName('runTestsInCoroutine');
         }
 
+        /* @phpstan-ignore-next-line */
         return parent::runTest();
     }