easier to take nuclear land if most of the land are nuclear (#241)

- **Revert "Change BorderTiles from Array to Set (#230)"**
- **easier to take nuclear land if most of the land are nuclear**

src/core/configuration/Config.ts

@@ -163,7 +163,7 @@ export interface Config {
   tradeShipSpawnRate(): number;
   defensePostRange(): number;
   defensePostDefenseBonus(): number;
-  falloutDefenseModifier(): number;
+  falloutDefenseModifier(percentOfFallout: number): number;
   difficultyModifier(difficulty: Difficulty): number;
   // 0-1
   traitorDefenseDebuff(): number;