Fixed advantage/disadvantage

module/dice/die/_module.mjs

@@ -1,7 +1,9 @@
 import DualityDie from './dualityDie.mjs';
-
-export const Dice = [DualityDie];
+import AdvantageDie from './advantageDie.mjs';
+import DisadvantageDie from './disadvantageDie.mjs';
 
 export const diceTypes = {
-    DualityDie
+    DualityDie,
+    AdvantageDie,
+    DisadvantageDie
 };

module/dice/die/advantageDie.mjs

@@ -0,0 +1,7 @@
+export default class AdvantageDie extends foundry.dice.terms.Die {
+    constructor(options) {
+        super(options);
+
+        this.modifiers = [];
+    }
+}

module/dice/die/disadvantageDie.mjs

@@ -0,0 +1,7 @@
+export default class DisadvantageDie extends foundry.dice.terms.Die {
+    constructor(options) {
+        super(options);
+
+        this.modifiers = [];
+    }
+}