CakePHP 4.x support

[smarek]

Hey,

since the CakePHP 4.x is released, and I found forks with 4.x support, do you plan to add the support too, or do you expect us to maintain fork with the support elsewhere?

Mentioned are https://github.com/chtheis/cakephp-error-email/commits/master and https://github.com/pettrbalint/cakephp-error-email/commits/master

Thank you