Write a function that accepts a list of ints and returns a copy of that list with duplicate ints removed
go test ./... -v -cover
=== RUN TestCase
Expected: [10 20 30 40 50], Output: [10 20 30 40 50]
--- PASS: TestCase (0.00s)
PASS
coverage: 70.0% of statements
ok github.com/mxssl/removeDup 0.142s coverage: 70.0% of statements