2.43.1 (unstable):
Distro packagers should probably not package this yet.

* Attribute: Add several create_attr_*() methods
  (Kjell Ahlstedt) Bug #781059 = Issue #2 (Tony Houghton)
* FontDescription: Add set/get_variations()
  (Kjell Ahlstedt)

Build:
* Require C++17.
  (Murray Cumming)
* Replace the Visual Studio project files with MSVC NMake project files
  (Chun-wei Fan) Merge request !1
* Use glibmm-2.60 instead of glibmm-2.56
  (Kjell Ahlstedt)
* Requires pango >= 1.41.0
  because of FontDescription::set/get_variations()
  (Kjell Ahlstedt)
* Change the ABI to pangomm-2.44
  (Kjell Ahlstedt)