Spec RFC: Allow interfaces to implement other interfaces

[mike-marcacci]

Per our discussion in the 2018-03-22 GraphQL WG meeting, I'm looking to explore change costs associated with the "Allow interfaces to implement other interfaces" RFC. @evans noted that we might start here. Any insight from the team at Apollo would be awesome!

• Spec Issue
• Spec RFC
• graphql.js PR

[stubailo]

Hi! Thanks for the note, but I'm gonna close it since it's not an issue on graphql-tools.