Fix typescript only rules are being checked against pure js files

[georgekaran]

Summary

Linting raw JS files in a project that uses the exported TypeScript config no longer fails with:

Error: Error while loading rule '@typescript-eslint/await-thenable': You have used a rule which requires type information, but don't have parserOptions set to generate type information for this file.

This happened because the recommendedTypeChecked config from typescript-eslint is spread without a filter for only TS files, so its type-aware rules were applied to pure JS files too, where the required type information isn't available.

• Fixes Typescript-only rules are being checked against pure JS files #488

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@croct/eslint-plugin@511

commit: 67b5e9b