Update phpcompatibility and codesniffer

[smoucka]

Description

Updating dev dependencies to take advantage of recent features/changes. Addresses ECOS-4387

Both PHPCompatibility and PHPCodesniffer have new maintainers.

PHPCodesniffer is actively releasing new versions - we're updating to take advantage of the newest features. The recently forked repo under current maintenance is available under the same packagist entry squizlabs/php_codesniffer 🙌

PHPCompatibility hasn't released a new version but the develop branch is getting new php 8.x sniffs and the branch is available. Let's use it to get access to those 8.x sniffs.

Manual Testing Steps

1. Made incompatible change locally - caught by pre-commit
   

Pre-Submission Checklist:

• You've updated the CHANGELOG following the steps here
• Internal Only - If this is a release, please confirm the following:
  • The links in the changelog have been updated to point towards the new versions
  • The version has been incremented in the following places: module.xml and composer.json

NOTE: Please use the Changelogger cli tool to manage versioned file upgrades.