Update fonttools to v3.44.0. Pin lxml to v4.3.5
Update fonttools to v3.44.0. Pin lxml to v4.3.5

The latest lxml has a regression:
LP#1838252: The order of an OrderedDict was lost in 4.4.0 when passing it as attrib mapping during element creation.

khaledhosny/psautohint,khaledhosny/psautohint