Merge pull request #572 from squaremo/release-0.5.6

Bump to v0.5.6

Author: squaremo

package-lock.json

@@ -2,7 +2,7 @@
   "name": "amqplib",
   "homepage": "http://squaremo.github.io/amqp.node/",
   "main": "./channel_api.js",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "An AMQP 0-9-1 (e.g., RabbitMQ) library and client.",
   "repository": {
     "type": "git",