Add support for customExecuteFn

[dios-david]

Hello! I'm using koa-graphql for almost a year now without any issues so far.
Recently I heard about graphql-jit and I want to experiment with it in my GraphQL server, but unfortunately koa-graphql doesn't support the customExecuteFn option which is needed to integrate graphql-jit.

As this project is a port of express-graphql which has the support for customExecuteFn, I made the required changes based on the implementation in express-graphql.

Let me know if there is anything needs to be changed!

[dios-david]

Hey @MaxDesiatov I'm not sure who to ping, but I saw the last merge was yours, so.. :) Can you please check this PR?

[MaxDesiatov]

Strictly speaking, I'm not a maintainer of this project to review PRs of this type. Maybe @chentsulin could help?

[sibelius]

what about just execute?

have you heard of helix (https://github.com/contrawork/graphql-helix) it is more versatile than koa-graphql

[dios-david]

Thanks @sibelius Helix definitely looks interesting, I will try that thanks for the heads up.
Currently I'm just looking for the simplest solution to integrate graphql-jit with my current setup, but in long term maybe migrating to something more complex (like Helix) would be a good idea.

[glen-84]

@chentsulin Is this project no longer maintained?

[chentsulin]

Thanks, that's a good addition. Sorry for the late reply. I will release a new version soon.

[chentsulin]

https://github.com/graphql-community/koa-graphql/releases/tag/v0.9.0