Update to 3.3.0 (fix RHBZ#1956265)
    
    - Use cmake(…) dependencies where appropriate
    - Unbundle lexertl14
    - Remove ExcludeArch on i686 and armv7hl since these are fixed in highfive (and
      an additional problem on armv7hl is fixed here)
    - Add license files to -doc subpackage; drop text doc files from others
    - Enable Sphinx documentation (with an alternative theme)
    - Use SETUPTOOLS_SCM_PRETEND_VERSION instead of a local git repo
    - Enable Python tests
    - Add header-only dependencies present in the public API to the -devel package