Added some suggested extensions

Nyholm · Nyholm · commit 4c7d1fdf6abe · 2015-12-06T10:23:45.000+01:00
diff --git a/composer.json b/composer.json
@@ -26,6 +26,10 @@
         "phpunit/phpunit": "5.0.*|^4.0",
         "matthiasnoback/symfony-dependency-injection-test": "0.7.*"
     },
+    "suggest":      {
+        "ext-memcached": "Allows for caching with Memcached",
+        "ext-redis":     "Allows for caching with Redis"
+    },
     "autoload":     {
         "psr-4": {
             "Cache\\Adapter\\DoctrineAdapterBundle\\": "src/"
