Upgrade Django to 2.2.9

requirements/base.txt

@@ -1,6 +1,6 @@
-Django==2.2.8 \
-    --hash=sha256:fa98ec9cc9bf5d72a08ebf3654a9452e761fbb8566e3f80de199cbc15477e891 \
-    --hash=sha256:a4ad4f6f9c6a4b7af7e2deec8d0cbff28501852e5010d6c2dc695d3d1fae7ca0
+Django==2.2.9 \
+    --hash=sha256:662a1ff78792e3fd77f16f71b1f31149489434de4b62a74895bd5d6534e635a5 \
+    --hash=sha256:687c37153486cf26c3fdcbdd177ef16de38dc3463f094b5f9c9955d91f277b14
 sqlparse==0.3.0 \
     --hash=sha256:40afe6b8d4b1117e7dff5504d7a8ce07d9a1b15aeeade8a2d10f130a834f8177 \
     --hash=sha256:7c3dca29c022744e95b547e867cee89f4fce4373f3549ccd8797d8eb52cdb873