message: Do not remove charset from URL pattern
diff: @@ -378,7 +378,7 @@ class BaseServer {
  let channel = Object.assign({}, callbacks)
  if (typeof pattern === 'string') {
  channel.pattern = new UrlPattern(pattern, {
  - segmentValueCharset: 'a-zA-Z0-9:_-'
  + segmentValueCharset: 'a-zA-Z0-9-_~ %:'
  })
  } else {
  channel.regexp = pattern
  