Bump version, update changelog

CHANGELOG.md

@@ -2,6 +2,22 @@
 Brick changelog
 ---------------
 
+2.4
+---
+
+Changes:
+* The `Keybindings` API now normalizes keybindings
+  to lowercase when modifiers are present. (See also
+  https://github.com/jtdaugherty/brick/issues/512) This means that,
+  for example, a constructed binding for `C-X` would be normalized to
+  `C-x`, and a binding from a configuration file written `C-X` would be
+  parsed and then normalized to `C-x`. This is because, in general, when
+  modifiers are present, input events are received for the lowercase
+  version of the character in question. Prior to changing this, Brick
+  would silently parse (or permit the construction of) uppercase-mapped
+  key bindings, but in practice those bindings were unusable because
+  they are not generated by terminals.
+
 2.3.2
 -----
 

brick.cabal

@@ -1,5 +1,5 @@
 name:                brick
-version:             2.3.2
+version:             2.4
 synopsis:            A declarative terminal user interface library
 description:
   Write terminal user interfaces (TUIs) painlessly with 'brick'! You