[Snyk] Security upgrade eslint from 7.25.0 to 9.0.0

[twilio-product-security]

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

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Prototype Pollution SNYK-JS-FLATTED-15700433	278

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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🦉 Prototype Pollution

[twilio-product-security]

This is a significant upgrade, jumping two major versions from 7.x to 9.x. It introduces substantial breaking changes, most notably a completely new configuration system.

Key Breaking Changes in v9.0.0

• New Configuration Format (Flat Config): The largest change is the move from the traditional .eslintrc.* file to a new eslint.config.js file, known as "flat config". The old format is now deprecated. Projects must migrate their configuration to the new format, or the linter will not work as expected. As a temporary workaround, you can set the ESLINT_USE_FLAT_CONFIG=false environment variable to continue using your .eslintrc file.
• Node.js Support: Support for Node.js versions older than 18.18.0 and version 19 has been dropped.
• Removed Core Rules: The valid-jsdoc and require-jsdoc rules have been removed. You must now use the eslint-plugin-jsdoc plugin for this functionality.
• Removed Formatters: Several formatters have been removed, including checkstyle, compact, junit, and tap. Only stylish, html, json, and json-with-meta remain.

Key Breaking Changes in v8.0.0

• Node.js Support: Support for Node.js versions 10, 13, and 15 was dropped.
• API Changes: The CLIEngine class was removed and replaced by the ESLint class, which affects programmatic integrations.
• Stricter Rules: The eslint:recommended configuration was updated with stricter checks.

Recommendation: This upgrade requires mandatory and significant changes to your project's configuration. Developers must migrate their .eslintrc file to the new eslint.config.js format. It is highly recommended to follow the official migration guides and test your linting setup thoroughly after upgrading.

Sources:

• ESLint v9 Migration Guide
• ESLint v8 Migration Guide
• ESLint v9.0.0 Release Notes

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.