Fix Laravel 9 test runner

[JamesFreeman]

I've got the test runner to work against Laravel 9 now I have made the following changes:

• Updated composer to allow 9.x packages
• Updated validated to match 9.x signature
• Reverted some typed elements as it was breaking the tests.

I do think looking at your PR it might be worth reverting all parameter/return types changes, especially in the contracts as this would be a breaking change.

Looks like I don't have access to run the tests against this repo, Here is mine: https://github.com/JamesFreeman/laravel-totem/runs/5403882721?check_suite_focus=true

[qschmick]

@JamesFreeman Thank you for the help, really appreciate it. I was planning on this being a new major release and there is a chance for BC as we're bumping the minimum PHP version and targeting a new major release of the framework.

[JamesFreeman]

Ah, that makes sense. Feel free to revert my type changes, I had to make them to get the tests to pass :)

[JamesFreeman]

Closed as merged in by @albanh and #327