Exact changelog is unknown, but there is Qt4 -> Qt5 switch.
Upstream changelog
==================
2.2.0 Release Candidate
There were more than 250 commits since 2.2.0-alpha, thus it was overdue to get rid of the alpha in the tag now.
With some more improvements in the last couple weeks, we switch directly to Release Candidate as the response from community is, that the master branch is stable.
There are only some minor changes in the line before the final 2.2.0 release.
There has been a lot of development since the previous version in
pkgsrc. DWG read/write support and SVG export are major features,
along with moving to Qt4 and onwards. The QCAD toolbar is no longer
supported, and the program is faster in operation than the previous
pkgsrc version.
Apart from the github commit log which is overly detailed, the
previous release information with some change logs is at
https://github.com/LibreCAD/LibreCAD/releases
