Support JSON/JSONB types for queries and mutations

[olirice]

What kind of change does this PR introduce?

Adds support for JSON and JSONB types in queries and mutations

Note:
JSON/B fields continue to be unavailable as targets for filtering or sorting because it isn't clear which operations should be supported, or how they should behave

resolves #105

[olirice]

Note:

This upgrades libgraphqlparser from 0.7.0 to current HEAD to get the bugfix graphql/libgraphqlparser@534a3cf

there is an open issue from 2020 asking for a new release graphql/libgraphqlparser#101 but no one has responded

libgraphqlparser will need to be updated on the supabase platform before this can go out

[ghost]

this is cool. when do we expect this feature to be rolled out on the supabase platform?

[olirice]

@rhacker this was included in release 0.3.2 and is available on new projects already. There is a delay getting it rolled out to existing projects because a couple of updates have to happen in sequence (libgraphqlparser) but that should be resolved within 10 days or so

You can check the version installed with

select * from pg_available_extensions where name = 'pg_graphql'

and if you need the feature urgently I can have an existing project upgraded for you if you send me the project_ref

[olirice]

@rhacker its rolling out this weekend