Codeigniter 4.0 installation using composer

I have started working on CodeIgniter latest version 4 that supports PHP 7+

I am going through the documentation installation using composer, everything seems to be fine expect their one comment under Cons section. What exactly they are referring to? What checks we should monitor?.

**Cons**

You still need to check for app/Config changes after updating

`composer update` only updates the system/ folder in vendor/.

But other files may be updated.
E.g., https://codeigniter4.github.io/CodeIgnit...ll-changes
You don't need to update many of these files, but it may be better you update some.

Or you must update a few files sometime.
E.g., https://codeigniter4.github.io/CodeIgnit...le-changes

In any case, before upgrading you need to read:
https://codeigniter4.github.io/CodeIgnit...ading.html

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

The docs will be updated.
See https://codeigniter4.github.io/CodeIgnit....html#cons

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper