Update dependencies correctly this time

Author: garyb

bower.json

@@ -17,8 +17,8 @@
   ],
   "dependencies": {
     "purescript-arraybuffer-types": "^2.0.0",
-    "purescript-datetime": "^1.0.0",
-    "purescript-http-methods": "^1.0.0",
+    "purescript-datetime": "^4.0.0",
+    "purescript-http-methods": "^4.0.0",
     "purescript-web-dom": "^1.0.0",
     "purescript-web-file": "^1.0.0"
   }