Composer dependency updates for Laravel 9 support

[tschallacka]

Pulled current develop branch into wip/1.2 to bring wip/1.2 up to date with the current status

Modified composer.json.

Referenced storm/wip/1.2 for storm dependency
Referenced wip/1.2 for the modules backend, cms, and system. This needs to be altered when work in progress becomes final.
Altered Laravel dependency to ~9.0
Set minimum PHP version to 7.4

Modified modules/backend/composer.json, modules/cms/composer.json, modules/system/composer.json

Altered Laravel dependency to ~9.0
Set minimum PHP version to 7.4

Updating the WIP branches as discussed here #148 (comment) would be greatly appreciated :-)

[LukeTowers]

@tschallacka 9.0 isn't out yet so we'll need to target the same version as the Storm library in 1.2, and then once 9.0 is out and we're ready to release 1.2 we can switch it back to 9.0

[tschallacka]

@LukeTowers My bad, fixed now with the same version that's in the storm library.

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[LukeTowers]

@tschallacka is Laravel 9 going to be requiring minimum of PHP 8 now?

[tschallacka]

@LukeTowers https://github.com/laravel/laravel/blob/77086029af21522a87af3c44e3b945cd02618f79/composer.json#L8

[LukeTowers]

@tschallacka could you bump it in the winter & storm repo PRs?

[tschallacka]

@LukeTowers I assume you mean the upgrade to nine branch, thats already done wintercms/storm@e59b50a#diff-d2ab9925cad7eac58e0ff4cc0d251a937ecf49e4b6bf57f8b95aab76648a9d34R46

[tschallacka]

Laravel has pushed its newest major release to 2022. https://laravel-news.com/laravel-9

Php8 & symfony 6

Maybe rename/move these commits to a laravel 9 branch so winter can push out an minor update in the long wait?

[LukeTowers]

@tschallacka we still are pushing minor updates, 1.2 is not blocking 1.1.*, our free time is doing that 😉