Update reset calls

app/Libraries/Groups.php

···
             // TODO: This shouldn't have to be called here, since it's already
             // called by `Group::afterCommit`, but `Group::afterCommit` isn't
             // running in tests when creating/saving `Group`s.
-            $this->resetCache();
+            $this->resetMemoized();
         }
 
         return $group;

app/Models/Group.php

···
 
     public function afterCommit()
     {
-        app('groups')->resetCache();
+        app('groups')->resetMemoized();
     }
 
     private function getColour(): ?string

app/Traits/Memoizes.php

···
 {
     private $memoized = [];
 
+    public function resetMemoized(): void
+    {
+        $this->memoized = [];
+    }
+
     protected function memoize(string $key, callable $function)
     {
         if (!array_key_exists($key, $this->memoized)) {
···
         }
 
         return $this->memoized[$key];
-    }
-
-    protected function resetMemoized(): void
-    {
-        $this->memoized = [];
     }
 }

database/factories/UserFactory.php

···
                         // TODO: This shouldn't have to be called here, since it's already
                         // called by `Group::afterCommit`, but `Group::afterCommit` isn't
                         // running in tests when creating/saving `Group`s.
-                        app('groups')->resetCache();
+                        app('groups')->resetMemoized();
                     }
 
                     $user->findUserGroup($group, true)->update(['playmodes' => $playmodes]);

tests/Browser/SanityTest.php

···
         UserProfileCustomization::truncate();
         UserStatistics\Osu::truncate();
 
-        app('groups')->resetCache();
+        app('groups')->resetMemoized();
     }
 
     private static function createScaffolding()
···
 
         self::$scaffolding['room'] = factory(Room::class)->create(['category' => 'spotlight']);
 
-        app('groups')->resetCache();
+        app('groups')->resetMemoized();
     }
 
     private static function filterLog(array $log)