Bump aff version

Author: natefaubion

bower.json

@@ -23,7 +23,7 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-aff": "^4.0.0-rc.5",
+    "purescript-aff": "^4.0.0",
     "purescript-argonaut-core": "^3.0.0",
     "purescript-arraybuffer-types": "^1.0.0",
     "purescript-dom": "^4.0.0",