Features

• allow passing custom validation function as validate option to buildSchema
• support defining deprecation reason and description of enum members (#714)

Fixes

• Breaking Change: throw error when wrong type of value provided as arg or input for GraphQLISODateTime and GraphQLTimestamp scalars
• don't include in schema the fields declared as @FieldResolver when that resolvers classes aren't provided in resolvers array
• fix grammar in CannotDetermineGraphQLTypeError error message
• properly inherit extensions from parent class and its fields