Relax upper bound on typelevel-prelude

Author: hdgarrood

bower.json

@@ -23,7 +23,7 @@
     "purescript-exceptions": "^4.0.0",
     "purescript-maybe": "^4.0.0",
     "purescript-nullable": "^4.0.0",
-    "purescript-typelevel-prelude": "^4.0.0"
+    "purescript-typelevel-prelude": ">= 4.0.0 < 6.0.0"
   },
   "devDependencies": {
     "purescript-console": "^4.1.0",