Fix schema for members

While working on another branch I noticed that this `resource_id` was
set to a string. I ran all the tests for sqlite, mysql, and postgres and
none failed so I think this is an oversight. As far as I can tell this
was supposed to be an integer.

activerecord/test/schema/schema.rb

@@ -220,7 +220,7 @@ ActiveRecord::Schema.define do
     t.integer :children_count, default: 0
     t.integer :parent_id
     t.references :author, polymorphic: true
-    t.string :resource_id
+    t.integer :resource_id
     t.string :resource_type
     t.integer :developer_id
     t.datetime :updated_at