Merge branch '3.4' into 4.2

* 3.4: (25 commits)
  Add missing ID_id validators translation
  fixed CS
  Added missing translations in validators.tr.xlf
  Update validators.es.xlf
  Update validators.hu.xlf
  [Validator] Add the missing translations for the Welsh (cy) locale
  [Validator] Add missing DE validator translations
  [Validator] Add the missing translations for the Dutch (nl) locale
  Add missing PL translation
  Add missing translations.
  Add missing translations for IT to Validator
  minor #30184 [Validator] Add the missing translations for the Russian (ru) locale (antonch1989)
  [Validator] Add the missing translations for the Arabic (ar) locale
  add_missing_translations_for_portuguese : [Validator] Add the missing translations for the Portuguese ("pt") locale
  [Validator] Add the missing translations for the French (fr) locale
  [Validator] Add some missing contents to the English translation
  use PropertyAccessorInterface instead of PropertyAccessor
  Fix KernelTestCase compatibility for PhpUnit 8 (bis)
  add xabbuh as code owner of the Form component
  [Validator] Added a missing translation
  ...

composer.json

@@ -21,8 +21,7 @@
         "php": ">=5.3.3"
     },
     "suggest": {
-        "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader",
-        "ext-zip": "Zip support is required when using bin/simple-phpunit"
+        "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader"
     },
     "conflict": {
         "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"