14.1.1

14.1.0

14.0.2

14.0.1

14.0.0

Allow interfaces to have no implementors (graphql#1376)

* Allow interfaces to have no implementors
Reverts graphql#1277, and implements spec removal from graphql#459. While it's an open question whether this validation is good, we need to provide an upgrade path for schemas that currently do not satisfy this validation rule.

* Update test to accept unimplemented interface