fixed some type errors

src/lib/helper/timeElapsed.ts

@@ -9,7 +9,7 @@ const MONTH = YEAR / 12;
  * @param {Date} date
  * @returns string
  */
-export default function timeElapsed(date) {
+export default function timeElapsed(date: Date) {
 	const now = new Date();
 	const age = Math.floor((now.getTime() - date.getTime()) / 1000);