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
Code16\Sharp\Form\Eloquent\Transformers\FormUploadModelTransformer class was refactored and renamed to
sharp.extensions.activate_custom_form_fields was renamed
sharp.extensions.activate_custom_form_fields config key was generalized and renamed to