June 2018 Spec compliance checklist

[anmonteiro]

The following is an incomplete but growing list of things that we need to support to achieve compliance with the Jun 2018 version of the Spec.

• [ ] Block strings (using """)
• [ ] Check that enum values are not true, false or null (http://facebook.github.io/graphql/June2018/#sec-Enum-Value)
• [ ] Field Selection Merging
• [ ] Validate that fragments must be used if defined in a document
• [x] the errors key must appear first if present (#131)
• [ ] Schema and object extensions