search for the following (platformID, platEncID)
        pairs in order::

                        (3, 10), # Windows Unicode full repertoire
                        (0, 6),  # Unicode full repertoire (format 13 subtable)
                        (0, 4),  # Unicode 2.0 full repertoire
                        (3, 1),  # Windows Unicode BMP
                        (0, 3),  # Unicode 2.0 BMP
                        (0, 2),  # Unicode ISO/IEC 10646
                        (0, 1),  # Unicode 1.1
                        (0, 0)   # Unicode 1.0

        This particular order matches what HarfBuzz uses to choose what
        subtable to use by default. This order prefers the largest-repertoire
        subtable, and among those, prefers the Windows-platform over the
        Unicode-platform as the former has wider support.

        This order can be customized via the ``cmapPreferences`` argument.
        N)