3.1

Hopefully you won't notice anything changed, just that things are a bit smoother and less buggy now.

• Updated Maxar and Mapbox imagery keys.
• Supporting tagging schema v6, added hundred new presets.
• Some POI like churches and libraries have reduced obsoletion rate (1 year).
• Deleting buildings via lifecycle prefixes is forbidden now.
• Added block_number field for japanese addresses.
• name:signed is not a language suffix.
• When downloading data for an area, do not delete new notes (but changes
  to existing notes would be lost though).
• Purge non-modified notes when purging all data.
• Update all secondary tags when changing a type for an amenity.
• Fixed error when after uploading new amenities and editing them, duplicates
  might have appeared.
• Pasting a wikimedia_commons value strips it of wiki formatting.
• Fixed long press on the sharing icon at the raw tags panel.
• Snack bar when removing a change does not time out for some reason.
  Forcibly closing it when leaving the changes list.
• Switched the editing page to a full screen dialog for better UX on iOS.
• Allow 1-character Japanese or Chinese search queries.
• Allow January dates on specific days opening_hours editor.
• More emoji for POI types (thanks @ivanbranco and @neuschaefer).
• Translations into Finnish (thanks Lasse Liehu), Marathi (thanks संकेत गराडे),
  and Hungarian (thanks Balázs Úr) languages, and major updates to Punjabi
  (both variants) and Persian.