Update composer.json to accept monolog/monolog 3.x

[jtolj]

Summary

Updates composer.json to accept monolog/monolog 3.x. The fixed 2.x requirement is currently preventing this package from working with Laravel 10 and other applications that use monolog 3.x.

Testing

There are currently no tests for the debug logging functionality, however I modified the setUp() method to enable logging with monolog 3.x installed and they passed as expected.

Checklist

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• The code passes when running PHPStan
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

[n7studios]

Thanks @jtolj - have added tests and submitted as a PR here. Should be available in this package as 1.2 later this week.