This commit adds a t.assert.snapshot() method that implements
snapshot testing. Serialization uses JSON.stringify() by default,
but users can configure the serialization to meet their needs.
PR-URL: https://github.com/nodejs/node/pull/53169
Fixes: https://github.com/nodejs/node/issues/48260
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>
cjihrig