Simplify mocks used

Author: paulbalandan

tests/system/CommonFunctionsTest.php

@@ -111,7 +111,7 @@ public function testRedirectReturnsRedirectResponse()
         \CodeIgniter\Services::injectMock('routes', $routes);
 
         $routes->add('home/base', 'Controller::index', ['as' => 'base']);
-        $response->method('redirect')->will($this->returnArgument(0));
+        $response->method('redirect')->willReturnArgument(0);
 
         $this->assertInstanceOf(RedirectResponse::class, redirect('base'));
     }

utils/PhpCsFixer/CodeIgniter4.php

@@ -150,6 +150,8 @@ public function __construct()
             'php_unit_fqcn_annotation'               => true,
             'php_unit_internal_class'                => ['types' => ['normal', 'final']],
             'php_unit_method_casing'                 => ['case' => 'camel_case'],
+            'php_unit_mock'                          => ['target' => 'newest'],
+            'php_unit_mock_short_will_return'        => true,
             'php_unit_no_expectation_annotation'     => [
                 'target'          => 'newest',
                 'use_class_const' => true,