chore: inline graphql-anywhere

[alessbell]

In light of the deprecation of graphql-anywhere in the course of releasing Apollo Client 3 in 2020, this PR inlines the graphql function previously imported from graphql-anywhere/lib/async as well as types Resolver and ExecInfo and removes all other references to the deprecated library.

NB: graphql-anywhere@4.2.8 was published today with an updated peer dependency range for the graphql package to fix the npm i peer dependency error with graphql@16 for npm7+ (apollographql/apollo-client#10114), and to include a deprecation notice.

Feel free to close this PR in favor of continuing with graphql-anywhere now that the peer dependency issue is resolved, but thought I'd open it in case it's useful :) Thanks!

[alessbell]

Note that bundle size also decreases with this PR:

Before (commit cde5f56)

After (commit 26147d2)

[fbartho]

This code looks pretty good! I haven't tested it yet myself, but do we see any reasons why this shouldn't merge?

[alessbell]

@fbartho thanks for the review 😄

All tests are passing:

I also went through and updated the three examples so they build with the latest version of all dependencies, and so I could do a manual test against a local build of this PR. Everything looks good:

Simple

Advanced

TypeScript

Reproduction Steps

If anyone wants to pull this PR and do the same, these are the reproduction steps:

• pull PR branch
• run npm i && npm run build
• run cp package.json lib
• run cd lib && npm pack
• update the apollo-link-rest line inside the package.json of whichever example you're running to "apollo-link-rest": "file:../../lib/apollo-link-rest-0.9.0-rc.1.tgz",
• npm i && npm start from inside the example's folder

[alessbell]

This is ready for a final pass 🙌

[alessbell]

@fbartho just following up - I went ahead and updated the examples, but would be happy to move them to a separate PR if you prefer.

[fbartho]

No that's fine!

[fbartho]

Shipped this in v0.9.0! -- Enjoy! https://www.npmjs.com/package/apollo-link-rest/v/0.9.0