extend breaking change detection by returning affected astnodes

[mmuth]

When comparing two GraphQL schemas and finding breaking changes between them, I'd propose to not only describe the found changes in a textual way (myType.field changed type from String to Int), but also add the technical background in forms of affected AST nodes.

I am just implementing a validation solution that tries to detect in detail, if a GQL client is affected by a breaking change. With this simple (and backwards compatible) addition, it is possible. Thought it could be useful in general :).

[linux-foundation-easycla[bot]]

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• :white_check_mark: Matthias Muth (ee62926bcf03d7d05ccb227cb7a67338ebab423d)

[github-actions[bot]]

The latest changes of this PR are available on NPM as graphql@16.3.0-canary.pr.3499.ee62926bcf03d7d05ccb227cb7a67338ebab423d Note: no gurantees provided so please use your own discretion.

Also you can depend on latest version built from this PR: npm install --save graphql@canary-pr-3499