Apply fixes from StyleCI (#321)

Author: binaryk

src/Fields/EagerField.php

@@ -57,8 +57,8 @@ public function resolve($repository, $attribute = null)
                 ->allowToShow(app(Request::class))
                 ->eagerState();
         } catch (AuthorizationException $e) {
-            if(is_null($relatedModel)) {
-                abort(403, "Related model is null.");
+            if (is_null($relatedModel)) {
+                abort(403, 'Related model is null.');
             }
 
             $class = get_class($relatedModel);