Breaking: #644 - Remove hard dependency to EXT:form

Description

extcode/cart itself doesn't need any code from typo3/cms-form.

This extension provide an itemProcFunc to provide a list of the form definition for a selector filtered by a given prototype. This extension provide an AddToCartFinisher which extends the AbstractFinisher of typo3/cms-form.

Both classes can be used by product extensions, but are not used by extcode/cart itself.

To achieve this, the part concerning the form definitions had to be moved to a separate class \Extcode\Cart\Hooks\FormDefinitions.

Affected Installations

Own product extensions that link products with form_definitions and have used the itemProcFunc ‘Extcode\Cart\Hooks\ItemsProcFunc->user_formDefinition’ in the TCA.

Migration

Replace

'itemsProcFunc' => 'Extcode\\Cart\\Hooks\\ItemsProcFunc->user_formDefinition',
'itemsProcFuncConfig' => [
    'prototypeName' => 'cart-events',
],

with

'itemsProcFunc' => \\Extcode\\Cart\\Hooks\\FormDefinitions::class . '->getItems',
'itemsProcFuncConfig' => [
    'prototypeName' => 'cart-events',
],