Upgrade framework

vendor/symfony/console/Output/BufferedOutput.php

@@ -16,17 +16,12 @@ namespace Symfony\Component\Console\Output;
  */
 class BufferedOutput extends Output
 {
-    /**
-     * @var string
-     */
-    private $buffer = '';
+    private string $buffer = '';
 
     /**
      * Empties buffer and returns its content.
-     *
-     * @return string
      */
-    public function fetch()
+    public function fetch(): string
     {
         $content = $this->buffer;
         $this->buffer = '';
@@ -37,12 +32,12 @@ class BufferedOutput extends Output
     /**
      * {@inheritdoc}
      */
-    protected function doWrite($message, $newline)
+    protected function doWrite(string $message, bool $newline)
     {
         $this->buffer .= $message;
 
         if ($newline) {
-            $this->buffer .= PHP_EOL;
+            $this->buffer .= \PHP_EOL;
         }
     }
 }