chore(deps): update dependency graphql to v15.3.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
graphql	devDependencies	minor	15.2.0 -> 15.3.0

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Release Notes

graphql/graphql-js

v15.3.0

Compare Source

v15.3.0 (2020-07-05)

New Feature 🚀

• #​2688 Added new 'FormattedExecutionResult' type (@​IvanGoncharov)

Docs 📝

3 PRs were merged

• #​2680 Docs: some language cleanup in readme and API reference (@​rmcteggart-r7)
• #​2681 Sync JSDoc comments with docs changes (@​danielrearden)
• #​2687 Make documentation for 'getFieldDef' more accurate (@​Cito)

Polish 💅

2 PRs were merged

• #​2679 mapAsyncIterator-test: replace 'invariant' with expect chains (@​IvanGoncharov)
• #​2686 ESLint: remove 'ts-lint' commits (@​IvanGoncharov)

Internal 🏠

• #​2685 workflows: check commit for ignored files (@​IvanGoncharov)

Dependency 📦

2 PRs were merged

• #​2678 Update deps (@​IvanGoncharov)
• #​2683 Update deps (@​IvanGoncharov)

Committers: 4

• Christoph Zwerschke(@​Cito)
• Daniel Rearden(@​danielrearden)
• Ivan Goncharov(@​IvanGoncharov)
• @​rmcteggart-r7

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