Added aseDie.rerollResult method to specifically reroll a specific result die in a grouping

module/dice/die/baseDie.mjs

@@ -0,0 +1,12 @@
+export default class BaseDie extends foundry.dice.terms.Die {
+    async rerollResult(resultIndex) {
+        const result = this.results[resultIndex];
+        result.rerolled = true;
+        result.active = false;
+        await this.roll({ reroll: true });
+
+        const rerolledResult = this.results[this.results.length - 1];
+        this.results.splice(this.results.length - 1, 1);
+        this.results.splice(resultIndex, 0, rerolledResult);
+    }
+}