inkscape: update to 0.92.2

Development for the 0.92.2 release was focused primarily on fixing bugs
and regressions. Among hundreds of code commits are fixes that provide:

* Better importing and exporting of EMF/WMF files, PDF/PDF+Latex
  documents, Visio Stencil files, and XML files
* Greater stability during printing on Windows
* Improved fill and stroke HSL color selection
* Greater stability when reverting and saving files

Among noteworthy feature and usability improvements are:

* An additional handle at the center of rectangles, circles/ellipses,
  and stars, to allow quick and accurate alignment of these shapes with
  other objects
* A command line option for updating the file's DPI value that allows for
  easier processing of large file collections
* Improvements to user-defined shortcuts, including the acceptance of
  previously restricted special characters

(markd)