Update readme, bump version to 0.6.0

README.md

@@ -79,6 +79,10 @@ How much logging datadog-lambda-layer-js should do. Set this to "debug" for exte
 
 If you have the Datadog Lambda Log forwarder enabled and are sending custom metrics, set this to true so your metrics will be sent via logs, (instead of being sent at the end of your lambda invocation).
 
+### DD_ENHANCED_METRICS
+
+If you set the value of this variable to "true" then the Lambda layer will increment a Lambda integration metric called `aws.lambda.enhanced.invocations` with each invocation and `aws.lambda.enhanced.errors` if the invocation results in an error. These metrics are tagged with the function name, region, and account, as well as `cold_start:true|false`.
+
 ## Usage
 
 Datadog needs to be able to read headers from the incoming Lambda event.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "datadog-lambda-js",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "description": "Lambda client library that supports hybrid tracing in node js",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",