Update dependency to require prelude 2.5.0

purescript-prelude 2.5.0 is where Eq1 and Ord1 were added

Fixes #28

Author: aij

bower.json

@@ -18,6 +18,6 @@
   ],
   "dependencies": {
     "purescript-monoid": "^2.2.0",
-    "purescript-prelude": "^2.4.0"
+    "purescript-prelude": "^2.5.0"
   }
 }