Fix: Simplify regular expression

Author: localheinz

src/TestReporter/ApiClient.php

@@ -97,7 +97,7 @@ private function sendWithCurl($url, $payload)
  $response = $this->buildResponse($response, $rawResponse);
  } else {
  $error = error_get_last();
- preg_match('/([0-9]{3})/', $error['message'], $match);
+ preg_match('/(\d{3})/', $error['message'], $match);
 
  $errorCode = 500;