validator-eslint: support eslint ^7.0.0 in devDeps and peerDeps

[legobeat]

↪️ Pull Request

• validator-eslint: support eslint ^7.0.0 as well as existing ^6.0.0 in devDeps and peerDeps
  • Update lockfile to use eslint ^7.0.0 by default. This dedupes eslint in the lockfile.
  • Preliminary tests indicate it works fine with eslint 7 out of the box.

✔️ PR Todo

• Added/updated unit tests for this change
• Filled out test instructions (In case there aren't any unit tests)
• Included links to related issues/PRs

[legobeat]

@mischnic @mattcompiles May the GitHub Action workflows for this PR be unlocked kind sers? 👼

[mischnic]

Looks like you'll need some of the changes from #8580 to fix the lint errors

[legobeat]

Looks like you'll need some of the changes from #8580 to fix the lint errors

Cheers!

lint passes locally as of 5d4e124.

[mischnic]

You also need to add the flowconfig change from #8580

[legobeat]

Breaking Benchmarks action addressed in parcel-bundler/parcel-benchmark-action#93 and parcel-bundler/parcel-benchmark-action#94

[legobeat]

Integration tests run fine on Node.js 16 on Windows: https://github.com/parcel-bundler/parcel/actions/runs/4934084435/jobs/8818729879?pr=8997

  1438 passing (7m)
  78 pending

But fail on Node.js 14 on Windows: https://github.com/parcel-bundler/parcel/actions/runs/4934084435/jobs/8818729522?pr=8997

 1437 passing (7m)
  78 pending
  1 failing

  1) cache
       dev deps
         should support yarn pnp:
     Error: EPERM: operation not permitted, rename 'D:\a\parcel\parcel\packages\core\integration-tests\test\input\goc5azngifv\node_modules' -> 'D:\a\parcel\parcel\packages\core\integration-tests\test\input\goc5azngifv\pnp'
      at Object.renameSync (fs.js:798:3)
      at setup (test\/cache.js:4077:16)
      at runMicrotasks (<anonymous>)
      at processTicksAndRejections (internal/process/task_queues.js:95:5)
      at testCache (test\/cache.js:80:7)
      at Context.<anonymous> (test\/cache.js:4063:17)



error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed.
Exit code: 1
Command: C:\hostedtoolcache\windows\node\14.21.3\x64\node.exe
Arguments: C:\npm\prefix\node_modules\yarn\lib\cli.js test-ci
Directory: D:\a\parcel\parcel\packages\core\integration-tests
Output:

info Visit https://yarnpkg.com/en/docs/cli/workspace for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Error: Process completed with exit code 1.

Perhaps it's about time to drop support for Node.js 14 anyway nowthat it's EoL..?