Update headers and clean up imports

client/helpers/random.ts

@@ -1,3 +1,8 @@
+/**
+ * A collection of popular layouts and patterns made with CSS (https://csslayout.io)
+ * (c) 2019 - 2020 Nguyen Huu Phuoc <https://twitter.com/nghuuphuoc>
+ */
+
 const random = (min: number, max: number) => min + Math.round(Math.random() * (max - min));
 
 export default random;