chore(CI): add tests for ESLint 8

[MichaelDeBoey]

ESLint v8.0.0 is released 🎉

devDependency compatibility with ESLint 8:

• @graphql-eslint/eslint-plugin (Support ESLint 8.x graphql-hive/graphql-eslint#595)
  • 🎱 feat: support ESLint 8 graphql-hive/graphql-eslint#683
  • v2.3.0
• eslint-plugin-eslint-plugin (Support ESLint 8.x eslint-community/eslint-plugin-eslint-plugin#175)
  • Breaking: Add meta.hasSuggestions property to meta-property-ordering rule eslint-community/eslint-plugin-eslint-plugin#119
  • Breaking: Drop support for Node 10, 13, 15 eslint-community/eslint-plugin-eslint-plugin#151
  • Build: test on eslint v8 (fixes #175) eslint-community/eslint-plugin-eslint-plugin#186
  • Breaking: Drop support for old minor versions of Node 12 and 14 eslint-community/eslint-plugin-eslint-plugin#212
  • v4.0.0-0
  • v4.0.0
• eslint-plugin-graphql (Support ESLint 8.x apollographql/eslint-plugin-graphql#310)
  • PR
  • Release
• eslint-plugin-node (Support ESLint 8.x mysticatea/eslint-plugin-node#294)
  • chore(CI): add tests for ESLint 7 mysticatea/eslint-plugin-node#224
  • feat: support ESLint 8.x mysticatea/eslint-plugin-node#295
  • Release
• vue-eslint-parser
  • Add test for ESLint v8 vuejs/vue-eslint-parser#122
  • Release

---

I wanted to update eslint-config-prettier, eslint-plugin-eslint-plugin, eslint-plugin-node & vue-eslint-parser to their latest minor, but that would break CI on the older ESLint/Node versions

If wanted, I can do it in this PR or make a second PR with all the breaking changes.
Edit: This can be done without a breaking change after #429 is merged

---

Closes #427

[BPScott]

If you rebase, a lot of this goes away. It looks like CI has passed successfully though, so it seems we're all v8 compliant.

I'd prefer to avoid testing pre-release versions though if possible so I'm tempted to close this, and we can revisit once v8.0.0 is released.

[MichaelDeBoey]

@BPScott Rebased onto master

I've also updated all ESLint-related dependencies to their latest versions.

[Belco90]

Hey! When will be this new version published? It didn't trigger any new release since it was merged as a chore, but this should be a new minor adding compatibility for ESLint v8.

[BPScott]

This PR changed development-only dependencies and what we run in CI. There were no code changes required to support eslint 8, what is already published to npm is sufficient.

[martin-badin]

Hi, I think you need to update peerDependencies as well.

 "peerDependencies": {
    "eslint": ">=7.28.0",
    "prettier": ">=2.0.0"
  },

[BPScott]

>=7.28.0 means anything above version including v8.ANYTHING. This package continues to work with both eslint v7.28 and up and v8 and up.