Add the Selection Sort Algorithm in Go

[raghavddps23]

1. Write the Selection Sort Algorithm in go lang
2. Include certain test cases as well
3. Make sure you include edge cases too.

Please put it into the easy folder.

[emhagman]

Can I take this one?

[emhagman]

Done here! #18 Let me know if I need to do anything else

[emhagman]

Any thoughts?