Added SymphonyPDO to composer require

Author: pointybeard

composer.json

@@ -18,7 +18,8 @@
     "require": {
         "php": ">=5.6.6",
         "monolog/monolog": "^1.16@dev",
-        "symfony/http-foundation": "^3.0@dev"
+        "symfony/http-foundation": "^3.0@dev",
+        "pointybeard/symphony-pdo": "~0.1"
     },
     "autoload": {
         "psr-4": {