QtWebEngine Documentation - Python3.8 incompatibility

During compilation of the Qt docs, the file qtwebengine/src/3rdparty/chromium/tools/licenses.py produces ModuleNotFound error because the function escape() was removed from cgi module in Python 3.8. To handle this error, the following workaround is used: to replace line 612:

if (sys.version_info[0] >= 3) and (sys.version_info[1] > 6):
    val = html.escape(repr(val))
else:
    val = cgi.escape(val)

instead of just  val = cgi.escape(val)