Pin kombu to 4.3.0
Celery can install kombu>=4.2.0
But kombu>4.3.0 requires redis>=3.2
@@ -35,6 +35,8 @@ Pygments==2.4.1
# https://stackoverflow.com/questions/53331405/django-compress-error-invalid-input-of-type-cachekey
# https://github.com/sebleier/django-redis-cache/pull/162
redis==2.10.6 # pyup: ignore
+# Kombu >4.3 requires redis>=3.2
+kombu==4.3.0
# Celery 4.2 is incompatible with our code
# when ALWAYS_EAGER = True
celery==4.1.1 # pyup: ignore
