CHANGES:

MintTea

• Add support for custom events – any Riot message sent to a Mint Tea app will
  become an Event.Custom msg event, which enables sending data into TUIs from
  other processes.

• Add key type for key down events – this means we now get better
  discoverability of what key down events we can match on, and its easier to
  keep examples working

• Capture more key events: arrows (left,down,up,right), backspace, space,
  enter, escape.

• Move initial_state to the application start invocation – you can now run
  your app with multiple initial states, which makes it ideal for starting apps
  in the middle of other flows, or to test specific scenarios.

• Fix bug where TTY was not restored from RAW mode during normal shutdown.

• Now the Event.Frame time event includes the frame time, and all examples
  are updated to work with it.

• Add new Hide_cursor and Show_cursor commands, and always restore the
  cursor to visible on exit

Leaves

• New Leaves.Fps to specify a frame rate and cap updates at that rate (Thanks
  to @sabine)

• New Leaves.Sprite module to create frame-based animations that are ticked
  at a specific frame-rate (Thanks to @sabine)

• New Leaves.Spinner contains several spinners ready to be used in
  applications (Thanks to @sabine)

• New Leaves.Text_input field ready to be used in applications (Thanks to
  @lessp)

• New Leaves.Cursor that can be used to highlight where the cursor is in a
  given text (Thanks to @nguermond)

• Reworked Leaves.Progress to support plain and gradient progress bars with
  customizable empty/full/trail characters, and to fit right into the
  make/update/view pattern.

Spices

• Implemented support for gradients between two RGB colors

Examples

• New Spinners example showcasing several spinners (Thanks to @sabine)

• New Emojis game example showcasing a tilemap and moving a player around

• New Basic example for the README tutorial

• New Progress bars examples showcasing plain, gradient, and emoji progress bars

• New Text input field example (Thanks to @lessp)

• Updated other examples to use the new progress bars

Docs

• New tutorial starting from zero and building a small shopping list app
  (Thanks to @metame)