Update predis version (#15)

Author: Fernando Dias

composer.json

@@ -16,7 +16,7 @@
     "require": {
         "php-amqplib/php-amqplib": "2.6.*",
         "monolog/monolog"        : "1.17.*",
-        "predis/predis"          : "1.0.*"
+        "predis/predis"          : "1.1.*"
     },
     "autoload": {
         "psr-4": {"MessageQueuePHP\\": "src/"}