Add lxml to requirements.txt

tianhao64 · web-flow · commit 65ee81b01b76 · 2019-03-17T21:44:51.000+08:00
lxml is removed from runtime, but it's still used by sso.py. Add it to the requirements.txt for now.
diff --git a/requirements.txt b/requirements.txt
@@ -1,3 +1,4 @@
+lxml >= 4.3.0
 pyVmomi >= 6.7
 suds ; python_version < '3'
 suds-jurko ; python_version >= '3.0'
