Enable the sort-keys eslint rule (#1746)

## Description:

Enable the `sort-keys` eslint rule.

Fixes #1629

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [ ] I have read and accepted the CLA agreement (only required once).

tests/util/Setup.ts

@@ -57,12 +57,12 @@ export async function setup(
   // Configure the game
   const serverConfig = new TestServerConfig();
   const gameConfig: GameConfig = {
+    bots: 0,
+    difficulty: Difficulty.Medium,
+    disableNPCs: false,
     gameMap: GameMapType.Asia,
     gameMode: GameMode.FFA,
     gameType: GameType.Singleplayer,
-    difficulty: Difficulty.Medium,
-    disableNPCs: false,
-    bots: 0,
     infiniteGold: false,
     infiniteTroops: false,
     instantBuild: false,