Update README to reflect updated peer dependency (#8)

Author: simonkotwicz

README.md

@@ -19,7 +19,7 @@ export log4js_logmet_logging_port=9091
 To get the secure token and space id see the instructions here: https://pages.github.ibm.com/alchemy-logmet/getting-started/authentication.html
 
 ## Usage
- You must be using [log4js-node](https://github.com/nomiddlename/log4js-node) 2.x and must call `log4js.configure('/path/to/log4js.json')`
+ You must be using [log4js-node](https://github.com/nomiddlename/log4js-node) 3.x and must call `log4js.configure('/path/to/log4js.json')`
 somewhere in your code.
 
 You must add the following to the list of appenders in your `log4js.json` file:

package.json

@@ -1,6 +1,6 @@
 {
     "name": "log4js-logmet-appender",
-    "version": "2.0.0",
+    "version": "2.0.1",
     "description": "Logmet appender for node-log4js",
     "author": "Herman Singh Badwal <hermanba@ca.ibm.com>",
     "license": "MIT",