ccshare 0.3.1 - tunnel progress in the menu bar

• The menu bar shows tunnel progress. "open anywhere link" used to flash
  "opening…" for a second and then look exactly like before while cloudflared
  took its 5-20 seconds. Now the row turns into a live "opening anywhere link…"
  state until the link is up (including the default background tunnel at
  startup), you get a notification when it's ready or when it gives up, and
  ccshare code prints "anywhere: link opening…" in the meantime.
• Copy the anywhere link in two shapes. Once the tunnel is live the menu
  offers "copy anywhere join command" (the full ccshare join … line) and
  "copy anywhere terminal link" (just the wss:// url), alongside the browser
  link.
• ccshare update explains itself. It now prints the version you went from
  and to, echoes the changelog headlines for every version you crossed, and
  gives specific fixes when you're offline, have local changes, or your clone
  diverged - instead of raw git/npm output that ended in an ambiguous "up to
  date" even when it did just update you.