JGraphT Version 1.5.2 Released!

After 2 quiet years, JGraphT 1.5.2 has been released! A full list of changes can be found here: https://github.com/jgrapht/jgrapht/blob/master/HISTORY.md
Different to previous releases, we decided to update all dependencies pre-release instead of post-release. This choice is motivated by the fact that our previous release dates back 2 years, and many of our software dependencies released new updates containing bug fixes and security enhancements.