docstr: Update the head table with the fields and values passed as
  keyword arguments.
code: def updateHead(self, **values):
      """Update the head table with the fields and values passed as
      keyword arguments.
      """
      self._updateTableWithValues("head", values)
  
imports: from .ttLib import TTFont, newTable
  from .ttLib.tables._c_m_a_p import cmap_classes
  from .ttLib.tables._g_l_y_f import flagCubic
  from .ttLib.tables.O_S_2f_2 import Panose
  from .misc.timeTools import timestampNow
  import struct
  from collections import OrderedDict
label_desc: Use image node_id 6 for calling the FontBuilder obj's underlying member method code with example usage: obj.updateHead() without return types