Returns the difference between two slices
go get github.com/matt9mg/go-slice-diff
listA := []string{"A", "B", "C"}
listB := []string{"A", "B", "D"}
diff := slice_diff.SliceDiff[string](listA, listB)
log.Println(diff) // []string{"D"}
listA := []int{1, 2, 3}
listB := []int{1, 2, 4}
diff := slice_diff.SliceDiff[int](listA, listB)
log.Println(diff) // []int{4}