Replace call to deprecated symfony method (#271)

Author: billypoke

src/Fractal.php

@@ -38,23 +38,23 @@ public static function create($data = null, $transformer = null, $serializer = n
         if (config('fractal.auto_includes.enabled')) {
             $requestKey = config('fractal.auto_includes.request_key');
 
-            if ($include = app('request')->get($requestKey)) {
+            if ($include = app('request')->query($requestKey)) {
                 $fractal->parseIncludes($include);
             }
         }
 
         if (config('fractal.auto_excludes.enabled')) {
             $requestKey = config('fractal.auto_excludes.request_key');
 
-            if ($exclude = app('request')->get($requestKey)) {
+            if ($exclude = app('request')->query($requestKey)) {
                 $fractal->parseExcludes($exclude);
             }
         }
 
         if (config('fractal.auto_fieldsets.enabled')) {
             $requestKey = config('fractal.auto_fieldsets.request_key');
 
-            if ($fieldsets = app('request')->get($requestKey)) {
+            if ($fieldsets = app('request')->query($requestKey)) {
                 $fractal->parseFieldsets($fieldsets);
             }
         }