feat(gatsby): Bumps eslint-config-react-app 4.x

[ThewBear]

Description

This PR introduces eslint-config-react-app 4.0.1 which comes with

• Typescript linting supports
• eslint-config-react-hooks

Related Issues & PRs

#15114
#15976

[wardpeet]

Could we bump eslint-config-react-app and don't include the typescript changes yet. We can get the update in and create another PR to add Typescript support. This way we can test the typescript support separately from the upgrade.

@LekoArts you seem to have experience with TS and gatsby so hopefully, you can have a look at the PR when @thebear44 splits it.

[ThewBear]

@wardpeet I removed the .tsx linting.
However, eslint-config-react-hooks lists @typescript-eslint/eslint-plugin and @typescript-eslint/parser as peer dependencies, removing them will cause npm warnings.

[wardpeet]

Let's get this one in. I've tested it on a few starters and testing .org as we speak.

[sidharthachatterjee]

👍

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