v0.9.101

Fixed

• Edits show up on the map immediately, on every server. A saved
  shape, a new feature, or a deletion could stay invisible (or a
  deleted feature could stay visible) for up to a minute, because the
  map tiles were served from a per-server cache that nothing cleared
  on a write. The database now tells every server the moment a layer
  changes and the stale tiles are dropped.
• New maps start on OpenStreetMap. Carto now watermarks its
  hosted basemaps (Positron, Voyager, Dark matter) with "API KEY
  REQUIRED" unless you supply your own key, and Positron was the
  default for every new map. Those three stay in the library with a
  note about the key; nothing defaults to them any more. Existing
  maps keep whatever basemap they have: switch them in Map settings.