emilsundberg made a commit several days ago to lock Pelago\Emogrifier to version 2.2.0 as Pelago\Emogrifier::disableInvisibleNodeRemoval() was deprecated and removed. https://packagist.org/packages/snowfire/beautymail#dev-master still keeps outdated version 6f503e1db32663ea1a460515c7de9cb0920a5acc with pelago/emogrifier: @dev.
To resolve it's required to add "pelago/emogrifier": "2.2.0" to your composer.json or use dev-master with latest commit.
emilsundberg made a commit several days ago to lock Pelago\Emogrifier to version 2.2.0 as Pelago\Emogrifier::disableInvisibleNodeRemoval() was deprecated and removed. https://packagist.org/packages/snowfire/beautymail#dev-master still keeps outdated version 6f503e1db32663ea1a460515c7de9cb0920a5acc with pelago/emogrifier: @dev. To resolve it's required to add "pelago/emogrifier": "2.2.0" to your composer.json or use dev-master with latest commit.