Merge branch '4.3' into 4.4

* 4.3:
  Fix symfony/phpunit-bridge not up to date in phpunit 4.8 test suite
  Sync "not implementing the method" deprecations messages

Author: nicolas-grekas

Tests/ResourceBundleTestCase.php

@@ -12,10 +12,13 @@
 namespace Symfony\Component\Intl\Tests;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Component\Intl\Locale;
 
 abstract class ResourceBundleTestCase extends TestCase
 {
+    use ForwardCompatTestTrait;
+
     // Include the locales statically so that the data providers are decoupled
     // from the Intl class. Otherwise tests will fail if the intl extension is
     // not loaded, because it is NOT possible to skip the execution of data
@@ -696,7 +699,7 @@ abstract class ResourceBundleTestCase extends TestCase
 
     private static $rootLocales;
 
-    protected function setUp(): void
+    private function doSetUp()
     {
         Locale::setDefault('en');
         Locale::setDefaultFallback('en');