Updating python dependencies

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

Change-Id: If354cd6b4f13592bbe33cc3496b553bc01033a27
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/requirements.in b/requirements.in
index 5476674..12fce5b 100644
--- a/requirements.in
+++ b/requirements.in
@@ -10,7 +10,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-aiohttp>=2.3.10,<=3.6.2
+aiohttp
 CherryPy>=18.1.2
 deepdiff
 jsonschema>=3.2.0