CHANGELOG.md in logstash-output-circonus-2.0.4 vs CHANGELOG.md in logstash-output-circonus-3.0.0

@@ -1,8 +1,16 @@
+# 3.0.0
+  - update to the new plugin api
+  - relax constraints on the logstash-core-plugin-api
+  - remove mention in the doc of the old syntax for the event
+  - update the travis file
+
 # 2.0.4
   - Depend on logstash-core-plugin-api instead of logstash-core, removing the need to mass update plugins on major releases of logstash
+
 # 2.0.3
   - New dependency requirements for logstash-core for the 5.0 release
+
 ## 2.0.0
  - Plugins were updated to follow the new shutdown semantic, this mainly allows Logstash to instruct input plugins to terminate gracefully, 
    instead of using Thread.raise on the plugins' threads. Ref: https://github.com/elastic/logstash/pull/3895
  - Dependency on logstash-core update to 2.0