fix circleci --ignore-platform-req=ext-redis

Author: lopadova

.circleci/config.yml

@@ -38,7 +38,7 @@ jobs:
             # fallback to using the latest cache if no exact match is found
             - v1-dependencies-
 
-      - run: composer install -n --prefer-dist --ignore-platform-req=redis
+      - run: composer install -n --prefer-dist --ignore-platform-req=ext-redis
 
       - save_cache:
           key: v1-dependencies-{{ checksum "composer.json" }}