Interview question of the issue #008 of rendezvous with cassidoo.
Implement a function rotateArray(int[] arr, n) which rotates an array by n places.
Example: [1, 2, 3, 4, 5] rotated by 2 gives [4, 5, 1, 2, 3].
Just pnpm i to install all dependencies and then pnpm t to run the tests!