Replaced regular callbacks by arrow functions when possible

module/Rest/src/Authentication/RequestToHttpAuthPlugin.php

@@ -43,9 +43,7 @@ class RequestToHttpAuthPlugin implements RequestToHttpAuthPluginInterface
     {
         return array_reduce(
             self::SUPPORTED_AUTH_HEADERS,
-            function (bool $carry, string $header) use ($request) {
-                return $carry || $request->hasHeader($header);
-            },
+            fn (bool $carry, string $header) => $carry || $request->hasHeader($header),
             false
         );
     }

module/Rest/src/Middleware/EmptyResponseImplicitOptionsMiddlewareFactory.php

@@ -11,8 +11,6 @@ class EmptyResponseImplicitOptionsMiddlewareFactory
 {
     public function __invoke()
     {
-        return new ImplicitOptionsMiddleware(function () {
-            return new EmptyResponse();
-        });
+        return new ImplicitOptionsMiddleware(fn () => new EmptyResponse());
     }
 }

module/Rest/test-api/Action/CreateShortUrlActionTest.php

@@ -91,9 +91,7 @@ class CreateShortUrlActionTest extends ApiTestCase
 
     public function provideMaxVisits(): array
     {
-        return map(range(10, 15), function (int $i) {
-            return [$i];
-        });
+        return map(range(10, 15), fn (int $i) => [$i]);
     }
 
     /** @test */

module/Rest/test/Authentication/AuthenticationPluginManagerFactoryTest.php

@@ -34,9 +34,7 @@ class AuthenticationPluginManagerFactoryTest extends TestCase
 
     private function getPlugins(AuthenticationPluginManager $pluginManager): array
     {
-        return (function () {
-            return $this->services;
-        })->call($pluginManager);
+        return (fn () => $this->services)->call($pluginManager);
     }
 
     public function provideConfigs(): iterable

module/Rest/test/ConfigProviderTest.php

@@ -28,15 +28,13 @@ class ConfigProviderTest extends TestCase
     /** @test */
     public function routesAreProperlyPrefixed(): void
     {
-        $configProvider = new ConfigProvider(function () {
-            return [
-                'routes' => [
-                    ['path' => '/foo'],
-                    ['path' => '/bar'],
-                    ['path' => '/baz/foo'],
-                ],
-            ];
-        });
+        $configProvider = new ConfigProvider(fn () => [
+            'routes' => [
+                ['path' => '/foo'],
+                ['path' => '/bar'],
+                ['path' => '/baz/foo'],
+            ],
+        ]);
 
         $config = $configProvider();
 

module/Rest/test/Middleware/AuthenticationMiddlewareTest.php

@@ -109,8 +109,6 @@ class AuthenticationMiddlewareTest extends TestCase
 
     private function getDummyMiddleware(): MiddlewareInterface
     {
-        return middleware(function () {
-            return new Response\EmptyResponse();
-        });
+        return middleware(fn () => new Response\EmptyResponse());
     }
 }