code: function go(path, title) {
    title = title || doc.title
    // browsers ignores the second parameter `title`
    history.pushState(null, title, base + normalize(path))
    // so we need to set it manually
    doc.title = title
    routeFound = false
    emit()
    return routeFound
  }
docs: Go to the path
  @param {string} path - destination path
  @param {string} title - page title
  @returns {boolean} - route not found flag