Publish new version and update Packagist

[mrleblanc101]

Hi, this plugin should define its laravel/nova@^4.0 in its composer.json so that it display as Nova 4 compatible on novapackages.com. Also it should be updated on packagist as it says the last update was 2 years ago and not 5 months ago. Thanks

[mrleblanc101]

Probably should close #27 and #29 at the same time

[BobbyBorisov]

ping @OwenMelbz