Merge pull request #297 from bigcommerce/eslint-warning

Update README with ESLint 9 compatibility info

Author: PascalZajac

README.md

@@ -6,4 +6,7 @@ For installation guide and setup please visit each package's readme.
 
 [@bigcommerce/eslint-config](packages/eslint-config)
 
-[@bigcommerce/eslint-plugin](packages/eslint-plugin)
+[@bigcommerce/eslint-plugin](packages/eslint-plugin)
+
+## ESlint 9 Compatibility
+Due to a [significant change](https://eslint.org/blog/2023/10/flat-config-rollout-plans/) in ESLint 9, this configuration set currently **requires** ESLint 8. In order to avoid peer dependency resolution issues, you need to also install `eslint` in your project, using the same version range as that found in [package.json](./package.json).