Change default birthday and tempban to fix conversion issue

ResultSet#getLong on a timestamp field is not allowed

src/main/java/client/DefaultDates.java

@@ -0,0 +1,19 @@
+package client;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+final public class DefaultDates {
+    // May 11 2005 is the date MapleGlobal released, so it's a symbolic default value
+
+    private DefaultDates() {
+    }
+
+    public static LocalDate getBirthday() {
+        return LocalDate.parse("2005-05-11");
+    }
+
+    public static LocalDateTime getTempban() {
+        return LocalDateTime.parse("2005-05-11T00:00:00");
+    }
+}