Laravel 10 Support

Update for Laravel versions 8 and 9

Merge pull request #64 from duxthefux/laravel-8

Added support for Laravel 8

Merge pull request #61 from duxthefux/fix-composer-package-name

Reverted package name to publiux/laravelcdn

Merge pull request #44 from publiux/development

Support for Laravel 5.7

Updated Symfony Dependencies

Added PHP 7.2 testing

Added support for Laravel 5.6

Merge pull request #32 from othyn/master

Update error messages to aid in debugging

Merge pull request #31 from othyn/master

Added DO (DigitalOcean) Spaces support by allowing the setting of 'endpoint' per DO's docs on S3 library interchangeability.