Update test

Author: dandavison

tests/test_converter.py

@@ -373,8 +373,7 @@ def fail(hint: Any, value: Any) -> None:
     # just accepting any dict.
     ok(MyTypedDictNotTotal, {"foo": "bar"})
     ok(MyTypedDict, {"foo": "bar", "blah": "meh"})
-    # Note, dicts can't have int key in JSON
-    fail(Dict[int, str], {1: "2"})
+    ok(Dict[int, str], {1: "2"})
 
     # Alias
     ok(MyDataClassAlias, MyDataClass("foo", 5, SerializableEnum.FOO))