Merge branch '3.4' into 4.2

* 3.4:
  [Phpunit] fixed support for PHP 5.3
  Response prepare method update
  [Workflow] Added missing license header
  Check if Client exists when test.client does not exist, to provide clearer exception message
  [Form] Preventing validation of children if parent with Valid constraint has no validation groups
  [Tests] fixed compatbility of assertEquals(): void
  [Intl] Fix test
  [Validator] Add the missing translations for the Arabic (ar) locale
  [Intl] Add compile binary
  [Form] Fixed some phpdocs

Author: fabpot

Resources/bin/compile

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+if [[ $1 == force || ! $(docker ps -a | grep symfony-intl) ]]; then
+    docker rm -f symfony-intl
+    docker create --name symfony-intl -it -v /tmp:/tmp -v $(pwd):/app -w /app jakzal/php-intl:7.2-63.1 bash
+    docker start symfony-intl
+    docker exec symfony-intl bash -xc "apt-get update && apt-get -y install build-essential"
+else
+    docker start symfony-intl
+fi;
+
+docker exec -u $(id -u):$(id -g) symfony-intl php src/Symfony/Component/Intl/Resources/bin/update-data.php

Tests/Util/GitRepositoryTest.php

@@ -45,7 +45,7 @@ public function testItThrowsAnExceptionIfInitialisedWithNonGitDirectory()
             $this->setExpectedException(RuntimeException::class);
         }
 
-        @mkdir($this->targetDir, '0777', true);
+        @mkdir($this->targetDir, 0777, true);
 
         new GitRepository($this->targetDir);
     }