Go Implementation For find-triplets-with-zero-sum

This note is to add Go implementation of below problem
https://practice.geeksforgeeks.org/problems/find-triplets-with-zero-sum/1

Golang playground url : https://play.golang.org/p/uI4CB5ck8ly

Hash implementation url: https://play.golang.org/p/VDYwCqAu2oV

Github code url 

Hash implementation Github code url