Added support for new incremental delivery format

[nathan-knight]

The format for incremental delivery has been updated: graphql/defer-stream-wg#69

I have added the new fields and ensured they get transmitted if they are present. It should still work with the previous format.

It is released in graphql@17.0.0-alpha.3, but I didn't want to disturb the existing integration test that uses it so I haven't added anything for it. In order to maintain the two in parallel the CI test would need to be duplicated to run with this version.

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[trevor-scheer]

@nathan-knight thanks for putting this together. The support for this in Apollo Server is still considered experimental / subject to change for exactly this reason, so I would like the smoke and integration tests to be updated to use the new alpha as well.

I didn't look too closely, but I'd also like for the "polyfill" stuff to match the latest alpha rather than attempt to be compatible with both. i.e. if there's anything in those types we should remove that are no longer relevant let's do that (and maybe you already did, I haven't verified against the graphql-js types or looked too closely at the PR).

[nathan-knight]

@trevor-scheer I didn't remove the old logic but if removing support for 17.0.0-alpha.1 and 17.0.0-alpha.2 is an option then I can try my hand at updating the tests and removing the outdated parts

[trevor-scheer]

@nathan-knight yeah I think that's ideal. Right now we reference an old canary build in various places, we should replace all references to those with graphql@17.0.0-alpha.3 and update tests as necessary.

To run the @defer tests locally, you'll need to:

• temporarily install graphql@17.0.0-alpha.3 at the top level dev dependencies (using --force)
• run tests with INCREMENTAL_DELIVERY_TESTS_ENABLED=t npm run test

OR

• (after updating the canary tag in prepare.sh to graphql@17.0.0-alpha.3
• run INCREMENTAL_DELIVERY_TESTS_ENABLED=t npm run test:smoke

Second option is less messy but the test output won't be as great.

[Maxou44]

Any news about this PR?