Use for-of instead of forEach (#3583)

Co-authored-by: syuilo <syuilotan@yahoo.co.jp>
Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

src/client/app/desktop/views/components/activity.calendar.vue

@@ -29,7 +29,9 @@ import Vue from 'vue';
 export default Vue.extend({
 	props: ['data'],
 	created() {
-		this.data.forEach(d => d.total = d.notes + d.replies + d.renotes);
+		for (const d of this.data) {
+			d.total = d.notes + d.replies + d.renotes;
+		}
 		const peak = Math.max.apply(null, this.data.map(d => d.total));
 
 		const now = new Date();