Require doctrine adapter 0.3

Author: Nyholm

composer.json

@@ -20,16 +20,12 @@
     "require":      {
         "php":                      "^5.5|^7",
         "symfony/framework-bundle": "^2.6|^3.0",
-        "cache/doctrine-adapter":   "^0.2"
+        "cache/doctrine-adapter":   "^0.3"
     },
     "require-dev":  {
         "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/"