Fix bigint serialization error (#916)

## Description:

- JSON serialization, bigint to string handling
- JSON deserialization, string to bigint handling

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

tests/Stats.test.ts

@@ -7,7 +7,7 @@ import {
 } from "../src/core/game/Game";
 import { Stats } from "../src/core/game/Stats";
 import { StatsImpl } from "../src/core/game/StatsImpl";
-import { replacer } from "../src/server/Archive";
+import { replacer } from "../src/core/Util";
 import { setup } from "./util/Setup";
 
 let stats: Stats;