feat: Add min and max and try to improve the performance

csv_test.go

@@ -23,11 +23,13 @@ func TestOperations(t *testing.T) {
 	}{
 		{"Sum", sum, []float64{300, 85.927, -30, 436}},
 		{"Avg", avg, []float64{37.5, 6.609769230769231, -15, 72.666666666666666}},
+		{"Min", min, []float64{10, 2.2, -20, 37}},
+		{"Max", max, []float64{100, 12.287, -10, 129}},
 	}
 
 	for _, tc := range testCases {
 		for k, exp := range tc.exp {
-			name := fmt.Sprintf("%sData%d", tc.name, k)
+			name := fmt.Sprintf("%s Data %d", tc.name, k)
 			t.Run(name, func(t *testing.T) {
 				res := tc.op(data[k])
 				// comparing floats might not be the best solution