migration symfony 5 4 (#300)

* symfony 5.4 (diff dev)

* symfony 5.4 (working)

* symfony 5.4 (update autoload)

* symfony 5.4 (remove swiftmailer mailer implementation)

* symfony 5.4 (php doc and split Global accessor class)


### Impacted packages:

composer require php:">=7.2.5 <8.0.0" symfony/console:5.4.* symfony/dotenv:5.4.* symfony/framework-bundle:5.4.* symfony/twig-bundle:5.4.* symfony/yaml:5.4.* --update-with-dependencies

composer require symfony/stopwatch:5.4.* symfony/web-profiler-bundle:5.4.* --dev --update-with-dependencies

lib/symfony/config/Definition/Builder/NumericNodeDefinition.php

@@ -26,7 +26,7 @@ abstract class NumericNodeDefinition extends ScalarNodeDefinition
     /**
      * Ensures that the value is smaller than the given reference.
      *
-     * @param mixed $max
+     * @param int|float $max
      *
      * @return $this
      *
@@ -45,7 +45,7 @@ abstract class NumericNodeDefinition extends ScalarNodeDefinition
     /**
      * Ensures that the value is bigger than the given reference.
      *
-     * @param mixed $min
+     * @param int|float $min
      *
      * @return $this
      *