4.0.0 (stable):

This is the first stable release in the libxml++-4.0 ABI series.
It is parallel-installable with the libxml++-2.6, libxml++-3.0
and libxml++-5.0 ABIs.

The tarball for 4.0.0 has been created with 'meson dist'.
If you build with Autotools from the tarball, please read
the relevant part of the README file.

Build:
* Use glibmm-2.68 instead of glibmm-2.64.
  (Kjell Ahlstedt)
* Add NMake Makefiles
  Remove Visual Studio 2010 projects
  (Chun-wei Fan) Pull request #11
* Use __declspec(dllexport) when building on Visual Studio
  Stop using gendef.exe
  (Chun-wei Fan) Pull request #14
* Add support for building with Meson
  (Kjell Ahlstedt, Chun-wei Fan) Pull request #16, #17, issue #19