Use estraverse for visiting AST

[ideadapt]

Hi

What do you think about using estraverse (https://github.com/estools/estraverse) ? I see that you are using your own module walkes. Maybe we change walkes to use estraverse, or directly replace walkes with estraverse. I'd prefer the latter.

[Swatinem]

Back in the day when I wrote this, I just needed the simplest possible thing. estraverse was just too large for my use cases.

But I dont really use or maintain either today. So if you want you can just take over maintainership completely :-)

[ChristianMurphy]

@ideadapt would you be interested in opening a pull request to refactor to estraverse?

[ideadapt]

@ChristianMurphy Interest may be there, but for now my focus is not on this. Having other stuff going on now that absorbs my time.