Updating python dependencies

Update of Python packages (using pip-compile) in preparation for
Release FOURTEEN

Change-Id: I898f0bc309968dc5cd7c08d20505555af3057870
Signed-off-by: Gulsum Atici <gulsum.atici@canonical.com>
diff --git a/requirements-test.txt b/requirements-test.txt
index b312377..fd0128d 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -14,13 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #######################################################################################
-coverage==6.4.1
-    # via
-    #   -r requirements-test.in
-    #   nose2
-mock==4.0.3
+coverage==7.1.0
     # via -r requirements-test.in
-nose2==0.11.0
+mock==5.0.1
     # via -r requirements-test.in
-six==1.16.0
-    # via nose2
+nose2==0.12.0
+    # via -r requirements-test.in