Use lxml v 4.1.1

[Mariatta]

The version of lxml specified in base-requirements.txt is lxml==3.4.4.
Somehow I'm having trouble installing it on my computer (Mac OS Sierra 10.12.6), there are a bunch of errors I don't understand.
When I changed that to lxml==4.1.1, everything works.

I wonder if the base-requirements.txt file can be updated so it uses lxml 4.1.1?

Thanks.

[berkerpeksag]

Yeah, they probably don't provide 3.4.4 binaries for newer Pythons and platforms anymore. I was going to upgrade it in eb8a9a0 but I didn't had enough time to read the lxml changelog. I will do that this week.