Enable various eslint rules (#1773)

## Description:

Enable various eslint rules.

## 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

tests/util/TestConfig.ts

@@ -10,8 +10,8 @@ import {
 import { TileRef } from "../../src/core/game/GameMap";
 
 export class TestConfig extends DefaultConfig {
-  private _proximityBonusPortsNb: number = 0;
-  private _defaultNukeSpeed: number = 4;
+  private _proximityBonusPortsNb = 0;
+  private _defaultNukeSpeed = 4;
 
   samHittingChance(): number {
     return 1;