feat: add Max, Min, and Average function

mathutil/mathutil_test.go

@@ -70,3 +70,13 @@ func TestTruncRound(t *testing.T) {
 	assert.Equal(TruncRound(0.125, 3), float64(0.125))
 	assert.Equal(TruncRound(33.33333, 2), float64(33.33))
 }
+
+func TestAverage(t *testing.T) {
+	assert := internal.NewAssert(t, "TestAverage")
+
+	assert.Equal(Average(0, 0), 0)
+	assert.Equal(Average(1, 1), 1)
+	avg := Average(1.2, 1.4)
+	t.Log(avg)
+	assert.Equal(1.3, RoundToFloat(avg, 1))
+}