Change to using arrow functions (#1603)

* Change to using arrow functions

Co-authored-by: v1b3m <vibenjamin6@gmail.com>
Co-authored-by: Matheus <matheus_benini@hotmail.com>

* Add lint rule

---------

Co-authored-by: v1b3m <vibenjamin6@gmail.com>
Co-authored-by: Matheus <matheus_benini@hotmail.com>
Co-authored-by: Charles Bochet <charles@twenty.com>

server/src/utils/anonymize.ts

@@ -1,6 +1,6 @@
 import crypto from 'crypto';
 
-export function anonymize(input: string) {
+export const anonymize = (input: string) => {
   // md5 shorter than sha-256 and collisions are not a security risk in this use-case
   return crypto.createHash('md5').update(input).digest('hex');
-}
+};