Fixes

Connect operations are now in subqueries (#341), which has the effect of fixing:
- Multiple instances being created for Mutations with both connect and create operations (#235)
- Multiple rows being returned when connecting to multiple nodes (#247)
Custom Cypher fields which return a list of primitive values now work as expected (#335)
An error is now thrown correctly when trying to query auth protected fields without being authenticated (#342)
Cypher query options (https://neo4j.com/docs/cypher-manual/current/query-tuning/#cypher-query-options) can now be set at a global level, which may help in resolving any Cypher issues (#342) - see https://neo4j.com/docs/graphql-manual/current/troubleshooting/#_query_tuning

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