node.parentNode will be removed in v3 along with JSAPI class wrapper on
each node.
Style manager uses it to find inherited styles. To workaround this
I collected all parents along with all styles. This constraints style
manager to work only with initial ast which should not be a problem as
each plagin execution is isolated.
Ref https://github.com/svg/svgo/issues/1499
- migrated to visitor plugin api
- covered with tsdoc
- made the plugin idempotent as requested a few times
Now even manually running svgo a few times will not duplicate
prefix in ids and classes
- run each plugin test twice to see which plugin need to run many times
ideally idempotent plugins will allow to get rid of multipass option in v3
This should help to avoid node.parentNode and closestByName
in some cases by skiping visiting children of current node.
Works only in `enter` listener.
