Update CHANGELOG.md

Author: darrenburns

CHANGELOG.md

@@ -12,6 +12,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added "tab" border style https://github.com/Textualize/textual/pull/5335
 - Added support for XML syntax highlighting https://github.com/Textualize/textual/pull/5320
 - Added `TextArea.update_highlight_query` https://github.com/Textualize/textual/pull/5320
+- `Input` widget now supports text selection via mouse and keyboard https://github.com/Textualize/textual/pull/5340
+- Added new keybinds (hold shift) for text selection in `Input` https://github.com/Textualize/textual/pull/5340
+- Added `Input.selection` reactive attribute for reading and updating the current selection https://github.com/Textualize/textual/pull/5340
+- Added `Input.select_on_focus` (default `True`) to enable/disable selecting all text in an `Input` on focus https://github.com/Textualize/textual/pull/5340
+- `Input` can now be scrolled independently of cursor position (hold shift and scroll with the mouse wheel in supported environments) https://github.com/Textualize/textual/pull/5340
+
+## Changed
+
+- Breaking change: Removed `Input` reactive attributes `view_position`, `cursor_position` (now exists as a property which proxies to the `Input.selection` reactive attribute), https://github.com/Textualize/textual/pull/5340
+- `Input.restrict` now checked on all edit operations (rather than just on `insert`) https://github.com/Textualize/textual/pull/5340
 
 
 ## Fixed