Update TODO

TODO.md

@@ -9,6 +9,7 @@ Related TODO files:
 
 ## Next
 
+- Shine Data Binding Expression (+ optimize shine to avoid calling bind)
 - Observe an array or nested arrays for all children changes on a specific property (e.g. observe(@game, 'tetris_blocks[][].color') ; returns |new_color, tetris_block| / observe(@game.players, '[].name') ; returns |name, player|)
 - Observe multiple attributes (e.g. observe(@game, [:width, :height]) returns |value, attribute_name|)
 - Fix issue with computed data-binding when combined with nested/indexed data-binding (it looks up computed attributes on root object instead of nested object, it seems)