fix: Update dependencies and module conversions

fix: Update dependencies and module conversions This commit addresses several issues found in CI and completes the conversion of modules to ES Modules. Key changes include: - Updated `package.json` and `package-lock.json` to include `globals` and adjust Node.js engine requirements. - Removed unnecessary `main` field from `package.json`. - Modified import statements to use `.js` extension for ES Module compatibility. - Updated import paths for checks modules (e.g., `custom.js` instead of `custom`). - Refactored CI test command to use `NODE_OPTIONS=--experimental-vm-modules`. - Corrected a minor documentation typo in the `README.md`. - Updated the coverage badge to reflect a more accurate coverage percentage.