code: function lintFiles(files) {
  
      const eslint = new CLIEngine()
  
      const report = eslint.executeOnFiles(files)
  
      return {
          text: friendlyFormatter(report.results),
          errorCount: report.errorCount,
      }
  
  }
docs: Perform ESLint validation on list of files
  @param {Array<string>} files
  @returns {Object} report