ESLint 9 invalid options

[RudyTheDev]

It seems that ESLint 9 has deprecated/changed some configuration stuff. My IDE (JetBrains Rider) reports:

Error: Invalid Options:
- Unknown options: reportUnusedDisableDirectives, resolvePluginsRelativeTo, rulePaths, useEslintrc, extensions, ignorePath
- 'extensions' has been removed.
- 'resolvePluginsRelativeTo' has been removed.
- 'ignorePath' has been removed.
- 'rulePaths' has been removed. Please define your rules using plugins.
- 'reportUnusedDisableDirectives' has been removed. Please use the 'overrideConfig.linterOptions.reportUnusedDisableDirectives' option instead.

These come from processOptions (node_modules\eslint\lib\eslint\eslint-helpers.js:839:15)

I am not familiar enough with any of this lint stuff to say more. These errors are not present on an earlier v8.57.0. So I am assuming some config files need to be updated? It's not saying where it's reading stuff from, but the IDE says it looks for .eslintrc.* files. These also seem to be more like warnings than errors because they don't stop the project being built/tested. I am not 100% sure this isn't just my IDE doing something weird.