Fix all test style issues for CI: Pest.php, TestCase.php, UserRepositoryTest.php.

Author: nejc

tests/Pest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
 |--------------------------------------------------------------------------
 | Test Case
@@ -26,9 +28,7 @@
 |
 */
 
-expect()->extend('toBeOne', function () {
-    return $this->toBe(1);
-});
+expect()->extend('toBeOne', fn () => $this->toBe(1));
 
 /*
 |--------------------------------------------------------------------------
@@ -41,7 +41,9 @@
 |
 */
 
-function something()
+function something(): void
 {
     // ..
 }
+
+uses()->group('default');

tests/TestCase.php

@@ -6,7 +6,4 @@
 
 use PHPUnit\Framework\TestCase as BaseTestCase;
 
-abstract class TestCase extends BaseTestCase
-{
-    //
-}
+abstract class TestCase extends BaseTestCase {}

tests/UserRepositoryTest.php

@@ -74,4 +74,4 @@
         expect($deleted)->toBeTrue();
         expect($repo->find($user->id))->toBeNull();
     });
-}); 
+});