[Feature Request]: Bump squizlabs/php_codesniffer

[thefrosty]

Is your feature request related to a problem?

Can't update/install over PHPCS standards that require latest php_codesniffer version.

Describe the desired solution

Currently squizlabs/php_codesniffer is locked at ~3.6.0, but now suggests 3.* or latest is now 3.7.1.

Describe the alternatives that you have considered

??

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[gmazzap]

Hi @thefrosty, thank you.

This is done in master with #6d7f5ab and will be added to next release.