Bump version, update changelog

CHANGELOG.md

@@ -2,6 +2,15 @@
 Brick changelog
 ---------------
 
+1.3
+---
+
+Package changes:
+* Removed dependency on `dlist`.
+
+Performance improvements:
+* Improved the performance of `vBox` and `hBox` (thanks Fraser Tweedale)
+
 1.2
 ---
 

brick.cabal

@@ -1,5 +1,5 @@
 name:                brick
-version:             1.2
+version:             1.3
 synopsis:            A declarative terminal user interface library
 description:
   Write terminal user interfaces (TUIs) painlessly with 'brick'! You