Add `getNestingStackToken` to `Twig.ParseState`
Add `getNestingStackToken` to `Twig.ParseState`

- This is a helper to quickly find the closest token of a specific type in a nest.

twigjs/twig.js,justjohn/twig.js,justjohn/twig.js,twigjs/twig.js,twigjs/twig.js,justjohn/twig.js