Please add support for ESLint 9, including Flat config support.

See:

• https://eslint.org/docs/latest/use/configure/configuration-files-new
• https://eslint.org/blog/2022/08/new-config-system-part-1/
• https://eslint.org/blog/2022/08/new-config-system-part-2/
• https://eslint.org/docs/latest/use/configure/migration-guide

Thanks!