message: docs: doc createWebHashHistory
diff: import { RouterHistory } from './common'
  import { createWebHistory } from './html5'
  +/**
  + * Creates a hash history.
  + *
  + * @param base optional base to provide. Defaults to `/`
  + */
  export function createWebHashHistory(base: string = '/'): RouterHistory {
  // Make sure this implementation is fine in terms of encoding, specially for IE11
  return createWebHistory(location.host ? base + '#' : '#')
  