bump version to 0.3.1

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "trapped",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "homepage": "https://github.com/herby/trapped",
   "authors": [
     "Herbert Vojčík <herby@mailbox.sk>"