Raise upper bound for purescript-web-dom

Author: garyb

bower.json

@@ -16,10 +16,10 @@
     "output"
   ],
   "dependencies": {
-    "purescript-arraybuffer-types": "^2.0.0",
-    "purescript-datetime": "^4.0.0",
-    "purescript-http-methods": "^4.0.0",
-    "purescript-web-dom": ">= 2.0.0 < 4.0.0",
-    "purescript-web-file": "^2.0.0"
+    "purescript-arraybuffer-types": "2",
+    "purescript-datetime": "4",
+    "purescript-http-methods": "4",
+    "purescript-web-dom": "2 - 4",
+    "purescript-web-file": "2"
   }
 }