disable wai-middleware-caching-redis (yogsototh/wai-middleware-caching#2)

Author: juhp

build-constraints.yaml

@@ -1579,7 +1579,7 @@ packages:
         - holy-project
         - wai-middleware-caching
         - wai-middleware-caching-lru
-        - wai-middleware-caching-redis
+        - wai-middleware-caching-redis < 0 # https://github.com/yogsototh/wai-middleware-caching/issues/2
 
     "Paul Rouse <pgr@doynton.org> @paul-rouse":
         - mysql-simple