Updated testing for PHP7

.phpunit.result.cache

@@ -0,0 +1 @@
+C:37:"PHPUnit\Runner\DefaultTestResultCache":675:{a:2:{s:7:"defects";a:0:{}s:5:"times";a:10:{s:40:"Gstt\Tests\AchievementTest::testUnlocked";d:0.17;s:37:"Gstt\Tests\AchievementTest::testSetup";d:0.012;s:38:"Gstt\Tests\AchievementTest::testUnlock";d:0.028;s:40:"Gstt\Tests\AchievementTest::testProgress";d:0.031;s:55:"Gstt\Tests\AchievementTest::testRelationsLockedUnsynced";d:0.026;s:53:"Gstt\Tests\AchievementTest::testRelationsLockedSynced";d:0.026;s:52:"Gstt\Tests\AchievementTest::testUnlockedWithMorphMap";d:0.012;s:48:"Gstt\Tests\AchievementTest::testAchieverMorphMap";d:0.013;s:63:"Gstt\Tests\AchievementTest::testAchievementProgressMapToDetails";d:0.013;s:45:"Gstt\Tests\ChainAchievementTest::testProgress";d:0.071;}}}

composer.json

@@ -21,7 +21,7 @@
         "ramsey/uuid": "^3.5"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.6",
-        "laravel/laravel": "^5.3"
+        "phpunit/phpunit": "^8",
+        "laravel/laravel": "^5.6"
     }
 }

tests/AchievementTest.php

@@ -15,7 +15,7 @@ class AchievementTest extends DBTestCase
     public $onePost;
     public $tenPosts;
 
-    public function setUp()
+    public function setUp():void
     {
         parent::setUp();
         $this->users[] = User::find(1);

tests/ChainAchievementTest.php

@@ -16,7 +16,7 @@ class ChainAchievementTest extends DBTestCase
     public $tenPosts;
     public $fiftyPosts;
 
-    public function setUp()
+    public function setUp():void
     {
         parent::setUp();
         $this->users[] = User::find(1);

tests/DBTestCase.php

@@ -22,11 +22,11 @@ public function createApplication()
     }
 
     /**
-     * Setup DB before each test.
+     * Setup the test environment.
      *
      * @return void
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         parent::setUp();
 
@@ -35,8 +35,6 @@ protected function setUp()
 
         Artisan::call('migrate');
         $this->seedUsers();
-
-        return;
     }
 
     public function seedUsers()