fix:更新已知bug,优化代码

vendor/symfony/console/Output/TrimmedBufferOutput.php

@@ -21,8 +21,8 @@ use Symfony\Component\Console\Formatter\OutputFormatterInterface;
  */
 class TrimmedBufferOutput extends Output
 {
-    private $maxLength;
-    private $buffer = '';
+    private int $maxLength;
+    private string $buffer = '';
 
     public function __construct(int $maxLength, ?int $verbosity = self::VERBOSITY_NORMAL, bool $decorated = false, OutputFormatterInterface $formatter = null)
     {
@@ -36,10 +36,8 @@ class TrimmedBufferOutput extends Output
 
     /**
      * Empties buffer and returns its content.
-     *
-     * @return string
      */
-    public function fetch()
+    public function fetch(): string
     {
         $content = $this->buffer;
         $this->buffer = '';