Improve release deliverable

• Fix composer autoloader complains on stubs file #7
• Exclude dev files from the deliverable

PHP8 compatibility

• Add PHP8 compatibility (thanks @aperret-dcs): #4 #5
• Code-style tweaks #6
• Implement auto-tests with GitHub Actions
• Improvements to composer.json

ContentState is now JsonSerializable

ContentState is now JsonSerializable

Now you can json_encode it directly:

/** @var $contentState \Prezly\DraftPhp\Model\ContentState */

// Convert $contentState to JSON string
echo json_encode($contentState);

ContentState to JSON serializer

Now you can serialize ContentState back to JSON.

/** @var $json string */
$json = \Prezly\DraftPhp\Serializer::serialize($contentState);

First release

1.0

Document PHP 7 requirement