Update to the latest react/cache

Author: WyriHaximus

composer.json

@@ -11,7 +11,7 @@
     "require": {
         "php": "^7.2",
         "clue/redis-react": "^2.0 || ^1.0 || ^0.5.1",
-        "react/cache": "^0.5.0"
+        "react/cache": "^0.6.0"
     },
     "require-dev": {
         "api-clients/test-utilities": "^5.4"