Update .php-cs-fixer.dist.php to add space before and after . operator

.php-cs-fixer.dist.php

@@ -11,6 +11,7 @@ return $config->setRules([
         'align_multiline_comment' => ['comment_type' => 'phpdocs_like'],
         //'strict_param' => true,
         'array_syntax' => ['syntax' => 'short'],
+        'concat_space' => ['spacing' => 'one'],
     ])
     ->setFinder($finder)
 ;