Add new change event types

[cskillingstad-stripe]

Summary & motivation

• Add new change event types for carddetailschange, savedpaymentmethodupdate, and savedpaymentmethodremove

Testing & documentation

• Wrote lint tests

[alexoser-stripe]

@cskillingstad-stripe Looks good, just left one question on the CardNetwork type

[alexoser-stripe]

We have CardNetworkBrand already, would it make sense to use that instead? Also cartes_bancaires and a few others from CardNetworkBrand are missing here.

[cskillingstad-stripe]

This is on purpose. We are only exposing the card brands that are publicly documented in the payment_method card object: https://docs.google.com/document/d/1dNA70BIrlKuXw02nmTpkiRUMApxSKjaVeyVjI1vmvBQ/edit?pli=1#heading=h.bhsr8nwiiq7d.

This was a requirement from the cards team.

I'm surprised we're exposing those brands in CardNetworkBrand. There are types that the card-metadata service returns that aren't publicly documented