Bump otr.js version

bower.json

@@ -17,7 +17,7 @@
     "strophe.vcard": "https://raw.github.com/jcbrand/strophejs-plugins/75c8693992bc357c699b6d615eeb396e799f5c02/vcard/strophe.vcard.js",
     "strophe.disco": "https://raw.github.com/jcbrand/strophejs-plugins/75c8693992bc357c699b6d615eeb396e799f5c02/disco/strophe.disco.js",
     "strophe.muc": "https://raw.github.com/jcbrand/strophejs-plugins/75c8693992bc357c699b6d615eeb396e799f5c02/muc/strophe.muc.js",
-    "otr": "~0.2.1",
+    "otr": "~0.2.5",
     "crypto-js": "~3.1.2",
     "almond": "~0.2.6"
   },