Merge pull request #836 from humanmade/backport-835-to-v18-branch

[Backport v18-branch] Update to latest hm/wp-redis version

composer.json

@@ -33,7 +33,7 @@
 		"humanmade/aws-xray": "~1.3.4",
 		"humanmade/s3-uploads": "^3.0.7",
 		"humanmade/cavalcade": "^2.0.2",
-		"humanmade/wp-redis": "1.1.2",
+		"humanmade/wp-redis": "1.4.4",
 		"humanmade/wordpress-pecl-memcached-object-cache": "2.1.0",
 		"humanmade/batcache": "~1.5.2",
 		"humanmade/ludicrousdb": "~5.0.6",