Specify packageDir option for eslint rule import/no-extraneous-dependencies

[jogold]

This option is to specify the path to the folder containing package.json and is relative to the current working directory. It may also be an array of multiple paths, to support monorepos.

See https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-extraneous-dependencies.md#options