Upgrade framework

vendor/symfony/console/Event/ConsoleEvent.php

@@ -14,7 +14,7 @@ namespace Symfony\Component\Console\Event;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Allows to inspect input and output of a command.
@@ -28,7 +28,7 @@ class ConsoleEvent extends Event
     private $input;
     private $output;
 
-    public function __construct(Command $command = null, InputInterface $input, OutputInterface $output)
+    public function __construct(?Command $command, InputInterface $input, OutputInterface $output)
     {
         $this->command = $command;
         $this->input = $input;
@@ -37,30 +37,24 @@ class ConsoleEvent extends Event
 
     /**
      * Gets the command that is executed.
-     *
-     * @return Command|null A Command instance
      */
-    public function getCommand()
+    public function getCommand(): ?Command
     {
         return $this->command;
     }
 
     /**
      * Gets the input instance.
-     *
-     * @return InputInterface An InputInterface instance
      */
-    public function getInput()
+    public function getInput(): InputInterface
     {
         return $this->input;
     }
 
     /**
      * Gets the output instance.
-     *
-     * @return OutputInterface An OutputInterface instance
      */
-    public function getOutput()
+    public function getOutput(): OutputInterface
     {
         return $this->output;
     }