add post id to comment resource.

Author: ajaymarathe

app/Http/Resources/Comments.php

@@ -21,6 +21,7 @@ public function toArray($request)
           'id' => $this->id,
           'body' => $this->body,
           'user' =>  new UserResource($this->user),
+          'post_id' => $this->post_id,
           'created_at' =>  $this->created_at->diffForHumans(),
           'updated_at' => $this->updated_at->diffForHumans(),
       ];