Laravel 9.x Compatibility

[laravel-shift]

This is an automated pull request from Shift to update your package code and dependencies to be compatible with Laravel 9.x.

Before merging, you need to:

• Checkout the l9-compatibility branch
• Review all comments for additional changes
• Thoroughly test your package

If you do find an issue, please report it by commenting on this PR to help improve future automation.

[laravel-shift]

:alembic: Using this package? If you would like to help test these changes or believe them to be compatible, you may update your project to reference this branch.

To do so, temporarily add Shift's fork to the repositories property of your composer.json:

{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/laravel-shift/laravel-fullcalendar.git"
        }
    ]
}

Then update your dependency constraint to reference this branch:

{
    "require": {
        "maddhatter/laravel-fullcalendar": "dev-l9-compatibility",
    }
}

Finally, run: composer update

[zammitryan]

I get an "Call to undefined function MaddHatter\LaravelFullcalendar\str_random()" when trying to implement.