fixed some type errors

src/lib/helper/caseNumberOccupied.ts

@@ -5,10 +5,10 @@ import { client } from '$lib/minio';
  * @param {string} caseNumber
  * @returns {Promise<boolean}
  */
-export default async function caseNumberOccupied(caseNumber) {
+export default async function caseNumberOccupied(caseNumber: string) {
 	const prefix = `${caseNumber}/config.json`;
 	const promise = new Promise((resolve) => {
-		let stream = client.listObjectsV2('tatort', prefix, false, '');
+		const stream = client.listObjectsV2('tatort', prefix, false, '');
 		stream.on('data', () => {
 			stream.destroy();
 			resolve(true);

src/lib/helper/shortenFileSize.ts

@@ -7,7 +7,7 @@ const GIGA = MEGA * KILO;
  * @param {number} size
  * @returns{string}
  */
-export default function shortenFileSize(size) {
+export default function shortenFileSize(size: number) {
 	const giga = Math.floor(size / GIGA);
 	let remainder = size % GIGA;
 	const mega = Math.floor(remainder / MEGA);

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);