Feature/math util (#22)

Development supports the math package

mathUtil/max_example_test.go

@@ -0,0 +1,15 @@
+package mathUtil
+
+import "fmt"
+
+func ExampleMax() {
+	res1 := Max([]int{5, 8, 9, 2, 1})
+	res2 := Max([]float64{3.14, 2.0, -0.1, 2.2, 100.11})
+
+	fmt.Println(res1)
+	fmt.Println(res2)
+
+	// Output:
+	// 9
+	// 100.11
+}