Enable unit tests for #430 and #462 Both have been fixed in the main code

Author: IndeedSi

src/test/java/com/cronutils/Issue430Test.java

@@ -13,7 +13,6 @@
 import java.time.ZoneOffset;
 import java.time.ZonedDateTime;
 
-@Ignore
 public class Issue430Test {
     @Test
     public void test() {
@@ -22,7 +21,8 @@ public void test() {
         Cron cron = parser.parse("0 0 12 30 6 ? 2020/10");
         ExecutionTime execution = ExecutionTime.forCron(cron);
         ZonedDateTime dateTime = ZonedDateTime.of(2020, 6, 30, 12, 0, 0, 0, ZoneOffset.UTC);
-        Assert.assertEquals(dateTime.minusYears(10), execution.lastExecution(dateTime).orElse(null));
+        // The cron starts from 2020, so no last execution date should be returned.
+        Assert.assertNull(execution.lastExecution(dateTime).orElse(null));
         Assert.assertEquals(dateTime.plusYears(10), execution.nextExecution(dateTime).orElse(null));
     }
 }

src/test/java/com/cronutils/Issue462Test.java

@@ -42,24 +42,21 @@ public void setUp() {
     /**
      * Faulty describe that includes a proposal for the fixed output.
      */
-    @Ignore
     @Test
-    public void testCaseEverySecondOnEvery30Minutes() throws ParseException {
+    public void testCaseEverySecondOnEvery30Minutes() {
         final String cronExpression = "* /30 * * * *";
         final Cron cron = parser.parse(cronExpression);
         // create the *** BY NOW ** wrong describe
         final String describe = descriptor.describe(cron);
         // ** will fail by now ** this is a just proposal how the describe may look like
-        assertEquals("every second, every 30 minutes", describe);
-        // this will pass by now but should ** NOT **
-        // assertEquals("every 30 minutes", describe);
+        assertEquals("every second every 30 minutes", describe);
     }
 
     /**
      * Correct describe for showing that the same output is generated.
      */
     @Test
-    public void testCaseOnceEvery30Minutes() throws ParseException {
+    public void testCaseOnceEvery30Minutes() {
         final String cronExpression = "0 /30 * * * *";
         final Cron cron = parser.parse(cronExpression);
         // create the correct describe