Prepare release 1.6.0 (#143)

* release 1.6.0

* Fix date

* Update CHANGELOG.md

Co-authored-by: Scott Opell <me@scottopell.com>

---------

Co-authored-by: Scott Opell <me@scottopell.com>

Author: gh123man

CHANGELOG.md

@@ -3,6 +3,11 @@ CHANGELOG
 
 [//]: # (comment: Don't forget to update src/DogStatsd.php:DogStatsd::version when releasing a new version)
 
+# 1.6.0 / 2023-05-10
+
+* Add support for [Unified service tagging](https://docs.datadoghq.com/getting_started/tagging/unified_service_tagging/?tab=kubernetes)
+* Remove `lib-curl` dependency and support for events API (using `APP_KEY`). Submitting events now requires a connection to a Datadog Agent.
+
 # 1.5.6 / 2023-01-3
 
 * Fix warnings to support PHP 8.2

src/DogStatsd.php

@@ -60,7 +60,7 @@ class DogStatsd
     private static $eventUrl = '/api/v1/events';
 
     // Used for the telemetry tags
-    public static $version = '1.5.6';
+    public static $version = '1.6.0';
 
     /**
      * DogStatsd constructor, takes a configuration array. The configuration can take any of the following values: