Migrate to PHPCSUtils #360
Draft
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It's been many years since it was suggested to use PHPCSUtils to simplify the helpers used by this sniff (see discussion in #214 and #149 and #132 and probably others).
Originally I had held off because PHPCSUtils had not stabilized, but it is definitely stable now.
I've finally decided to try the migration to see what benefits it could provide.
This PR is the first step in that process that should eventually lead to 3.0.
Warning
Do not merge this into the 2.x branch! It changes the minimum supported versions of phpcs and adds a new dependency!