Version 2.0.0

This release upgrades the project to Java 11 and turns it into a full JPMS module. This necessitated some package-level changes, meaning our public API changed, thus requiring a new major version.

Features

• #19 Upgrade to java 11 and make java module system (jigsaw) compliant
  The public API changed due to some classes moving packages and some package-renames.
  java-chartjs-data and java-chartjs-serialization are full JPMS modules now
  java-chartjs-wicket can't be turned into a full module due to some dependencies not being far enough along so has only a module name for now.
• #21 Add test module that actually renders graph and tests via selenium
  Expanded the tests of the wicket submodule to also use selenium in combination with htmlunit for front end tests.
  It's a pretty basic test now but this can be expanded upon to create more intricate tests as needed.