Bump transformers dependency

Author: garyb

bower.json

@@ -25,6 +25,6 @@
     "purescript-console":      "^0.1.0",
     "purescript-exceptions":   "^0.3.0",
     "purescript-functions":    "^0.1.0",
-    "purescript-transformers": "^0.7.1"
+    "purescript-transformers": "^0.8.1"
   }
 }