Bump to version 0.4.0

Version 0.4.0 includes the following new features

* the tomorrow-night-80s theme by @jmfurlott
* the --to-theme switch to convert a config file to a theme

Author: Tony Crisci

package.json

@@ -27,7 +27,7 @@
     "mocha": "*",
     "chai": "*"
   },
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Make your i3wm config a little more stylish",
   "devDependencies": {},
   "scripts": {