Update lxml from 4.2.3 to 4.2.4 (#725)
Update lxml from 4.2.3 to 4.2.4 (#725)


mozbhearsum/balrog,testbhearsum/balrog,testbhearsum/balrog,mozbhearsum/balrog,mozbhearsum/balrog,testbhearsum/balrog,mozbhearsum/balrog,testbhearsum/balrog