Feature: allow replacing a node with another node that is not a subclass of it

Currently node replacement only allow to replace a node with another node that is subclass of the node you are trying to replace,, but this isn't always the case, for example in my case i needed to make a new paragraph node that extending from the element node directly and i can't replace the original paragraph node with my node

**Alternative Solution:**
I can add a transform that replaces any paragraph node with my node

**NOTE**: I would love to make a PR if that is okay with you