code: function clean(done) {
    let d = path.dirname(pack.main);
    let e = path.extname(pack.main);
    let b = path.basename(pack.main);
    let n = b.replace(e, '');
    let mapf = path.join(d, b + '.map');
    let minf = path.join(d, n + minext + e);
  
    del([pack.main, mapf, minf, '*.log'], done);
  }
docs: clean up