code: function filterDeps (deps) {
    if (!filterList.length) return deps
  
    return Object.keys(deps).reduce(function (filteredDeps, name) {
      if (filterList.indexOf(name) !== -1) {
        filteredDeps[name] = deps[name]
      }
      return filteredDeps
    }, {})
  }
docs: Filter the passed deps (result from david) by the dependency names passed on the command line