saddle-points: add version comment

https://github.com/exercism/x-common/blob/73f439401051f3e5a14b07dd43f64ca5cd41b405/exercises/saddle-points/canonical-data.json

exercises/saddle-points/src/test/java/MatrixTest.java

 
 import static org.junit.Assert.assertEquals;
 
+/*
+ * version: 1.0.0
+ */
 public class MatrixTest {
 
     @Test