PHP 8.0 | Squiz.WhiteSpace.MemberVarSpacing: add support for attributes

[mandarinian]

Seems like my PR #3334 being stuck, I made suggested fixes, but nobody responded for 4 days. For some reason "re-request review" button on Reviewers is not clickable for me.

It is my first contribution, so if it is not stucked, but just nobody has time to review, sorry and you may close an issue.

[jrfnl]

@yariknechyporuk There is only one active person with merge access to the repo and that person hasn't had time to review yet. Please have some patience and close this issue.

[mandarinian]

Ok, sorry