Add raw_value to GRAPHQL_RUBY_KEYWORDS
Add raw_value to GRAPHQL_RUBY_KEYWORDS

All object types have the method `raw_value` via
`GraphQL::Schema::Object.include(HandlesRawValue)` so this should be
considered reserved too.

rmosolgo/graphql-ruby,rmosolgo/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby