Bump version to 0.4.1

Author: thejpster

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pc-keyboard"
-version = "0.4.0"
+version = "0.4.1"
 authors = ["Jonathan 'theJPster' Pallant <[email protected]>"]
 description = "PS/2 keyboard interface library. Handles UK 105-key keyboards producing Scancode Set 2."
 keywords = ["arm", "cortex-m", "template", "video", "menu"]