[ANNOUNCE] Luke 7.3.1 released

[tomoko.uc...@gmail.com]

Download the release zip here:

https://github.com/DmitryKey/luke/releases/tag/luke-7.3.1

- Upgrade to Lucene 7.3.1.

- UI Framework has been switched to JavaFX.

and, other changes in this release: <https://github.com/DmitryKey/luke/blob/luke-7.3.1/CHANGES.txt>

From this release, we will update JavaFX version only and stop maintenance Thinlet Luke. Bug reports or feedback is welcome!

Note: If you use OpenJDK you need to install OpenJFX separately to run JavaFX. Oracle HotSpot JVM includes JavaFX runtime.