Update requirements with the new released libraries

Change-Id: I5d6aef685a920d4a3bb486e1a69543526b651363
diff --git a/lib/xos-kafka/requirements.txt b/lib/xos-kafka/requirements.txt
index ee9de7b..b1d4024 100644
--- a/lib/xos-kafka/requirements.txt
+++ b/lib/xos-kafka/requirements.txt
@@ -1,3 +1,3 @@
 confluent-kafka==0.11.5
 multistructlog~=2.1.0
-xosconfig~=3.2.5
+xosconfig~=4.0.0