Apply fixes from StyleCI

Author: julles

src/Classes/Presenters/ChartPresenter.php

@@ -130,6 +130,7 @@ public function colors($series = [])
     public function credits($credits = [])
     {
         $this->transform->credits = $credits;
+
         return $this;
     }
 

src/Classes/Presenters/JsTransformerPresenter.php

@@ -104,7 +104,7 @@ public function encode_colors()
     public function credits()
     {
         $data = $this->credits;
-        $this->credits = !empty($data)? 'credits: '.json_encode($data, JSON_UNESCAPED_UNICODE).',' : null;
+        $this->credits = !empty($data) ? 'credits: '.json_encode($data, JSON_UNESCAPED_UNICODE).',' : null;
 
         return $this;
     }