Add missing keywords (#1501)
Add missing keywords (#1501)

See: https://docs.npmjs.com/files/package.json#keywords

Fixes:
https://www.npmjs.com/package/graphql#license
graphql/graphql-js,enaqx/graphql-js,jjergus/graphql-js,enaqx/graphql-js,graphql/graphql-js,graphql/graphql-js,enaqx/graphql-js,jjergus/graphql-js