Merge branch '5.4' into 6.3

* 5.4:
  [Tests] Streamline
  [Validator] updated Romanian translation

Author: nicolas-grekas

Tests/AppVariableTest.php

@@ -44,7 +44,7 @@ public function testDebug($debugFlag)
         $this->assertEquals($debugFlag, $this->appVariable->getDebug());
     }
 
-    public static function debugDataProvider()
+    public static function debugDataProvider(): array
     {
         return [
             'debug on' => [true],

Tests/Command/LintCommandTest.php

@@ -146,7 +146,7 @@ public function testComplete(array $input, array $expectedSuggestions)
         $this->assertSame($expectedSuggestions, $tester->complete($input));
     }
 
-    public static function provideCompletionSuggestions()
+    public static function provideCompletionSuggestions(): iterable
     {
         yield 'option' => [['--format', ''], ['txt', 'json', 'github']];
     }

Tests/Extension/FormExtensionDivLayoutTest.php

@@ -99,7 +99,7 @@ public function testThemeBlockInheritanceUsingDynamicExtend()
         );
     }
 
-    public static function isSelectedChoiceProvider()
+    public static function isSelectedChoiceProvider(): array
     {
         return [
             [true, '0', '0'],
@@ -149,7 +149,7 @@ public function testStartTagHasActionAttributeWhenActionIsZero()
         $this->assertSame('<form name="form" method="get" action="0">', $html);
     }
 
-    public static function isRootFormProvider()
+    public static function isRootFormProvider(): array
     {
         return [
             [true, new FormView()],
@@ -380,14 +380,14 @@ protected function setTheme(FormView $view, array $themes, $useDefaultThemes = t
         $this->renderer->setTheme($view, $themes, $useDefaultThemes);
     }
 
-    public static function themeBlockInheritanceProvider()
+    public static function themeBlockInheritanceProvider(): array
     {
         return [
             [['theme.html.twig']],
         ];
     }
 
-    public static function themeInheritanceProvider()
+    public static function themeInheritanceProvider(): array
     {
         return [
             [['parent_label.html.twig'], ['child_label.html.twig']],