[Snyk] Security upgrade eslint from 4.1.0 to 9.0.0

[saurabharch]

Snyk has created this PR to fix 1 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• fixtures/eslint/package.json
• fixtures/eslint/yarn.lock

Note for zero-installs users

If you are using the Yarn feature zero-installs that was introduced in Yarn V2, note that this PR does not update the .yarn/cache/ directory meaning this code cannot be pulled and immediately developed on as one would expect for a zero-install project - you will need to run yarn to update the contents of the ./yarn/cache directory.
If you are not using zero-install you can ignore this as your flow should likely be unchanged.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Prototype Pollution SNYK-JS-JSYAML-13961110	631

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Prototype Pollution

[gemini-code-assist]

Summary of Changes

Hello @saurabharch, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request, automatically generated by Snyk, performs a significant security upgrade by updating the eslint dependency from version 4.1.0 to 9.0.0. This upgrade is crucial for mitigating a 'Prototype Pollution' vulnerability. Due to the major version bump, the dependency tree has been extensively updated, which may introduce breaking changes and requires careful review, especially for projects utilizing Yarn's zero-install feature.

Highlights

• Security Upgrade: This pull request upgrades the eslint dependency from version 4.1.0 to 9.0.0 to address a 'Prototype Pollution' security vulnerability (SNYK-JS-JSYAML-13961110).
• Major Version Bump: The upgrade involves a major version change for eslint, which has resulted in a comprehensive update of the yarn.lock file due to changes in transitive dependencies. This may introduce breaking changes.
• Automated Fix: This pull request was automatically generated by Snyk to apply the necessary security fix.
• Zero-Install Consideration: Users leveraging Yarn's zero-installs feature should be aware that the .yarn/cache/ directory is not updated by this PR and will require a manual yarn command to synchronize.

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[gemini-code-assist]

Code Review

This PR upgrades eslint from v4 to v9 to fix a security vulnerability. This is a major upgrade with significant breaking changes. The eslint-plugin-react-hooks package's peerDependencies does not support ESLint v9, which will break this test fixture. This must be updated in packages/eslint-plugin-react-hooks/package.json. Additionally, ESLint v9 uses a new configuration format ("flat config") and has deprecated babel-eslint, both of which are used in this project and should be updated. This upgrade requires careful manual changes beyond this automated PR.

[gemini-code-assist]

While upgrading eslint is necessary, this is a major version jump to v9. The eslint-plugin-react-hooks package, which this fixture tests, does not list ESLint v9 as a compatible peerDependency in its package.json. This will cause issues. The peerDependencies in packages/eslint-plugin-react-hooks/package.json must be updated to include ^9.0.0.