[5.7] Apply `square bracket syntax for array destructuring assignment…

…` (#25966)

Apply `square bracket syntax for array destructuring assignment`, for more information please look into https://wiki.php.net/rfc/short_list_syntax

This rfc was implemented in PHP v7.1. Laravel support php from the 7.1.3

Command.php

@@ -123,7 +123,7 @@ public function __construct()
      */
     protected function configureUsingFluentDefinition()
     {
-        list($name, $arguments, $options) = Parser::parse($this->signature);
+        [$name, $arguments, $options] = Parser::parse($this->signature);
 
         parent::__construct($this->name = $name);
 

Parser.php

@@ -82,7 +82,7 @@ protected static function parameters(array $tokens)
      */
     protected static function parseArgument($token)
     {
-        list($token, $description) = static::extractDescription($token);
+        [$token, $description] = static::extractDescription($token);
 
         switch (true) {
             case Str::endsWith($token, '?*'):
@@ -108,7 +108,7 @@ protected static function parseArgument($token)
      */
     protected static function parseOption($token)
     {
-        list($token, $description) = static::extractDescription($token);
+        [$token, $description] = static::extractDescription($token);
 
         $matches = preg_split('/\s*\|\s*/', $token, 2);