v1.2.3

• Updated minimum fonttools requirement to 3.9.2; fixes an issue in fontTools.varLib.merger with recombining multiple PairPosFormat2 subtables (fonttools/fonttools#888)
• Added standalone fontmake executable bundling all the dependencies as well as the Python interpreter in a single file, pre-compiled for macOS and Windows (experimental). Simply unzip and run, no setup needed.

EDIT: On Windows, you may need to install Microsoft's vc_redist.x64.exe, which installs the run-time components required to run C/C++ applications built using Visual Studio 2015. Download it from the Microsoft website: https://www.microsoft.com/en-gb/download/details.aspx?id=48145