Migration guide

Major versions of Pa11y Lint Config can bring API or compatibility changes. This is a guide to help you make the switch when that happens.

Migrating to 3 from 2

Upgrade to Node.js 18 or above.
Modifies some names and aliases for rulesets:
1. Drops es2015's alias es6
2. Drops legacy's alias es5
3. Renames legacy to es2009