Migrating to v4

This document describes the breaking changes from v3 to v4 of the jaredwray/fumanchu library.

We are now fully migrated 🎉 and all helpers are in typescript and working correctly

We no longer support the legacy helpers that were in this project as we have migrated to a new helper system.
createHandlebars is now deprecated in favor of just using fumanchu() and no more needing async.
The FumanchuOptions has been changed on filtering and also now fully supported with fumanchu()
Caching is now enabled by default! 🚀