Fix JSON type serialization

[calebmer]

JSON objects have been serializing incorrectly. This has been mentioned a couple of times like in #116 or #102.

This fixes the problem, but still doesn’t add arbitrary JSON to the tree as is advocated in #102 👍

[ferdinandsalis]

Looks good

[valoricDe]

I am still encountering the "False boolean values always null" / unknown. But I'm already on newest master (2.3.0 I guess). 😢 Anything I could check? function public.upsert_vote(integer, integer, integer, unknown) does not exist" whereas the unknown is the false value.

[benjie]

@Valorize: are you using the dynamicJson setting? Can you come up with a minimal test case (i.e. schema, query and variables) that reproduces the issue?

[benjie]

Or, even better would be if you could reproduce it using one of the postgraphql tests - that way we can prevent it from happening again in future 👍

[valoricDe]

@benjie Good idea. Which parameters do I have to supply to $npm_bin/jest $@?

[benjie]

@Valorize Check out the CONTRIBUTING.md file for instructions - let me know if that doesn't cover your questions as one of my missions is to improve developer onboarding to PostGraphQL 😃