Fix Bug 2234 Upgrading Python libjuju to 2.9.42.1

Change-Id: I5b8ffe300f81b8dc82cad210fd394f354d06025c
Signed-off-by: Gulsum Atici <gulsum.atici@canonical.com>
diff --git a/requirements.in b/requirements.in
index 6c89871..3680b76 100644
--- a/requirements.in
+++ b/requirements.in
@@ -13,7 +13,7 @@
 #     limitations under the License.
 
 async-timeout<4
-juju==2.9.10
+juju==2.9.42.1
 kubernetes
 motor==1.3.1
 pyasn1