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/finder/CHANGELOG.md

@@ -1,6 +1,38 @@
 CHANGELOG
 =========
 
+5.4.0
+-----
+
+ * Deprecate `Comparator::setTarget()` and `Comparator::setOperator()`
+ * Add a constructor to `Comparator` that allows setting target and operator
+ * Finder's iterator has now `Symfony\Component\Finder\SplFileInfo` inner type specified
+ * Add recursive .gitignore files support
+
+5.0.0
+-----
+
+ * added `$useNaturalSort` argument to `Finder::sortByName()`
+
+4.3.0
+-----
+
+ * added Finder::ignoreVCSIgnored() to ignore files based on rules listed in .gitignore
+
+4.2.0
+-----
+
+ * added $useNaturalSort option to Finder::sortByName() method
+ * the `Finder::sortByName()` method will have a new `$useNaturalSort`
+   argument in version 5.0, not defining it is deprecated
+ * added `Finder::reverseSorting()` to reverse the sorting
+
+4.0.0
+-----
+
+ * removed `ExceptionInterface`
+ * removed `Symfony\Component\Finder\Iterator\FilterIterator`
+
 3.4.0
 -----