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>

front/src/utils/isDeeplyEqual.ts

@@ -1,5 +1,3 @@
 import deepEqual from 'deep-equal';
 
-export function isDeeplyEqual<T>(a: T, b: T) {
-  return deepEqual(a, b);
-}
+export const isDeeplyEqual = <T>(a: T, b: T) => deepEqual(a, b);