remove 'string' type with 'text' for elasticsearch 6

Author: basemkhirat

src/config/es.php

@@ -83,14 +83,11 @@
                 'posts' => [
                     'properties' => [
                         'title' => [
-                            'type' => 'string'
+                            'type' => 'text'
                         ]
                     ]
                 ]
             ]
-
         ]
-
     ]
-
 ];