Add Statamic 6 / PHP 8.4 / Laravel 12 to test matrix

[robocopklaus]

Summary

The CI test matrix only covers Statamic 5 / PHP 8.3 / Laravel 11, but composer.json declares "statamic/cms": "^5.0|^6.0". Statamic 6 compatibility is claimed but not CI-tested.

Problem

# .github/workflows/tests.yml — current matrix
strategy:
  matrix:
    include:
      - php: 8.3
        laravel: 11
        statamic: 5
        testbench: 9

Only one matrix entry exists. There is no testing against:

• Statamic 6
• PHP 8.4
• Laravel 12
• Orchestra Testbench 10

Impact

Breaking changes in Statamic 6 or Laravel 12 would not be caught by CI. Users upgrading to Statamic 6 could encounter runtime errors.

Suggested Fix

strategy:
  matrix:
    include:
      - php: 8.3
        laravel: 11
        statamic: 5
        testbench: 9
      - php: 8.4
        laravel: 12
        statamic: 6
        testbench: 10

Also update require-dev to allow broader ranges:

"orchestra/testbench": "^9.0|^10.0",
"pestphp/pest": "^2.34|^3.0"

References

• File: .github/workflows/tests.yml:17-24
• File: composer.json
• Consolidated review finding: V6