Attribute added in `beforeCreate` hook not serialized into payload

[nickschot]

• Platform: MacOS 10.13
• Database: Postgres 9.6
• Lux Version: 1.2.2
• Node Version: 8.7.0

When using the beforeCreate (and probably some of the other hooks too) to set a model attribute which is not set by the request, it is not serialized/returned in the payload/response.

Changing attributes which already exist in the request in the same way works fine.

[jamemackson]

I am doing something similar to this where I will set the id attribute in beforeCreate and beforeUpdate and haven't had any trouble with this.