This pull request makes the necessary changes required to support Statamic 5.

This PR will be added to as time goes on.

Changes

• Updates the version constraint in composer.json
  • Changed to dev-master for now. Once v5 has been released, it can be changed to ^5.0.
• Adjusted testing matrix
• Replaces laravel/helpers functions
  • Statamic 5 dropped the laravel/helpers dependency, which provided backwards compatibility for old string/array helpers.
  • We were using some of the helpers provided by this package, so I've replaced them with calls to Laravel's Str class.
• Simplifies the TestCase
  • This was made possible by [5.x] Simplify TestCase for addons statamic/cms#9573.
• Fixed broken Ignition solutions.
• Changed how we call the Antlers parser in SendConfiguredNotifications
  • Previously, we were directly calling the Regex parser. However, the Regex Parser has been removed in Statamic 5 so this updates the code to call Antlers::parser() instead.
• Changed how we get a database table's columns
  • Laravel 11 removed its doctrine/dbal dependency but it provided alternative methods for everything it was providing, so we've adjusted our code to use it.

To Do

• Investigate failing order notification tests
• Adjust version constraints in composer.json & testing matrix to released versions, rather than dev-* versions.