[6kyu][algorithms] Find The Parity Outlier solution

You are given an array (which will have a length of at least 3, but
could be very large) containing integers. The array is either entirely
comprised of odd integers or entirely comprised of even integers except
for a single integer N. Write a method that takes the array as an
argument and returns this "outlier" N.

lib/findOUtlier/index.ts

@@ -0,0 +1,3 @@
+import { findOUtlier } from "./findOUtlier";
+
+export default findOUtlier;