Support php 8.0.8

[Widres8]

[InvalidArgumentException]
Package beyondcode/laravel-credentials has a PHP requirement incompatible with your PHP version, PHP extensions and Composer version
:
- beyondcode/laravel-credentials requires php ^7.1 which does not match your installed version 8.0.8.
- beyondcode/laravel-credentials requires illuminate/encryption 5.6.|5.7.|5.8.*|^6.0|^7.0|^8.0 but it is not present.

[mdtaiyabhesabe]

[InvalidArgumentException]
Package beyondcode/laravel-credentials has a PHP requirement incompatible with your PHP version, PHP extensions and Composer version:

• beyondcode/laravel-credentials requires php ^7.1 which does not match your installed version 8.1.6.

[cyberlightdev]

I know it's an older issue and this is a workaround, but if you're wanting to use PHP 8/8.1 and or Laravel 9, my PR #44 can be used directly. Instructions are in my comment on that PR.