Upgrading from 4.2.x to 5.x ​

First, notice that the 5.X version is the first to follow semver — so do not expect breaking change until 6.x.

FormUploadModelTransformer was renamed ​

The Code16\Sharp\Form\Eloquent\Transformers\FormUploadModelTransformer class was refactored and renamed to Code16\Sharp\Form\Eloquent\Uploads\Transformers\SharpUploadModelAttributeTransformer

The sharp.extensions.activate_custom_form_fields was renamed ​

The sharp.extensions.activate_custom_form_fields config key was generalized and renamed to sharp.extensions.activate_custom_fields