Update addSeries() to take in modern date and time classes

[WeiJian123-tech]

I noticed that the addSeries() method takes in Java's Data class. Even though Java's Date class may suffice, there are new classes from Java 8+ that could be implemented to ease the development process such as LocalTime, LocalDateTime, ZonedDateTime, and Instant that could help programmers insert date and time in their x and y axis. Java's Data class has most of its methods depreciated so updating addSeries() method to included such new date and time classes would help programmers tremendously.