Code cleanup and add types on stores

src/utils/functions/index.ts

@@ -62,7 +62,7 @@ export const capitalizeFirstLetter = (string: string) => {
 /**
  * Create a delay
  */
-export function sleep (milliseconds: number) {
+export const sleep = (milliseconds: number) => {
     return new Promise(resolve => setTimeout(resolve, milliseconds))
 }