[ANNOUNCE] Apache DataSketches Java 4.2.0 Release

[Alexander Saydakov <sa...@yahooinc.com.INVALID>]

Dear Apache DataSketches community,

The Apache DataSketches team is proud to announce the release of Apache
DataSketches Java 4.2.0.

This is the core Java component of the DataSketches library that includes
all the sketch algorithms in production-ready packages. These sketches can
be called directly from this component or used in conjunction with the
adapter components such as Apache Druid, Apache Pig, Apache Hive etc.
This is a minor release with the following changes:

   - Generic KLL quantile sketch was implemented
   - An incompatibility of serialized format of empty Frequent Items sketch
   with C++ version of the library was fixed
   - A number of code improvements to fix issues found by SpotBugs and
   CodeQL
   - Documentation improvements both internal as well as Javadocs

Release on Github:
https://github.com/apache/datasketches-java/releases/tag/4.2.0
Javadoc: https://apache.github.io/datasketches-java/4.2.0/

Thank you to the PMC members and community for taking the time to review
this release!

Alexander Saydakov
alsay@apache.org