Bump version (#5169)

FontForge March 2022 Release

Merge pull request #4484 from jtanx/ver
Update version tags

Merge pull request #4221 from jtanx/coverity
Fix a couple of coverity issues

Along with the usual bugfixes, there have been a couple of
new features worth calling out:
* Added Croatian translation
* Added user decompositions
* New graphic for the splash/about screen
* Images embedded in SFDs are now serialised as PNGs
  - This is enabled by default, but may be turned off with
    the 'WritePNGInSFD' option.
  - A new tag is used to identify this mode; 'Image2',
    instead of 'Image'
  - This requires FontForge to be compiled with libpng support.
    If not compiled with libpng, FontForge will revert to
    the old method of serialising RLE encoded raw images.
As part of an ongoing effort to clean up the code base,
there have additionally been multiple build system changes:
* Python 2 support is deprecated. It is strongly recommended
  to build with Python 3 support. Python 2 support will be
  removed in a future release.
* Both the Windows and Mac builds are now built with
  Python 3 instead of Python 2.
* The minimum supported version for the Mac build is now
  MacOS Sierra (10.12)
* FontForge no longer uses gnulib
* collab support has been removed
* The build system now expects libuninameslist to be
  present, and will fail if it is not found. Building without
  libuninameslist must be explcititly specified using
  --without-libuninameslist

This is a bugfix focused release.
Most notably, it fixes a crash on MacOS when browsing files.
Plugin support and direct http/ftp browsing support has also been removed.

Nothing changes in the repository, but we need to upload new packages…
… for Ubuntu 16.04.

20170731 Windows release

This rolls up a lot of fixes and adjustments.