ESLint JUnit Formatter

Standalone npm package for ESLint's official JUnit XML formatter. Version 9.0.1 targets Node ^18.18.0 || ^20.9.0 || >=21.1.0 and ships TypeScript types. Released alongside ESLint releases, it extracts the built-in JUnit formatter into a separate module for use in CI/CD pipelines (e.g., Jenkins). No external dependencies. Different from similar packages by being directly sourced from ESLint's official source.