include winston into dependencies and version update

In this commit I:

1. I have included "winston" into the winston-loggly-bulk's dependencies so that we can skip running command "npm install winston".
2. Updated the version of winston-loggly-bulk from 1.4.2 to 1.4.3.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "winston-loggly-bulk",
-  "version": "1.4.2",
+  "version": "1.4.3",
   "description": "A Loggly transport for winston",
   "author": "Loggly <opensource@loggly.com>",
   "contributors": [
@@ -21,10 +21,10 @@
   },
   "keywords": ["loggly", "logging", "sysadmin", "tools", "winston"],
   "dependencies": {
-    "node-loggly-bulk": "^1.2.1"
+    "node-loggly-bulk": "^1.2.1",
+    "winston": "^2.3.1"
   },
   "devDependencies": {
-    "winston": "1.0.x",
     "vows": "0.8.0"
   },
   "main": "./lib/winston-loggly",