Update CHANGELOG to include new Ansible support limits from #134

This release does not explicitly drop support for versions of Ansible
<2.3. However, going forward, we will only be actively supporting the
last two stable releases of Ansible. It should remain possible to run
this role with versions of Ansible as far back as 2.0. Future releases
will not guarantee this compatibility.

See https://docs.ansible.com/ansible/latest/release_and_maintenance.html
for the official Ansible release cycle and support information.

CHANGELOG.md

@@ -6,13 +6,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 ## [Unreleased]
 
-## [2.0.0] - 2018-02-06
+## [2.0.0] - 2018-02-07
 ### Breaking Change
 - Split up the variables used to determine if a host gets rabbitmq/redis for more flexibility in deployments. (@tculp)
   `sensu_deploy_rabbitmq` and `sensu_deploy_redis` are now `sensu_deploy_rabbitmq_server` and `sensu_deploy_redis_server` respectively.
   See the [role variable documentation](https://github.com/sensu/sensu-ansible/blob/master/docs/role_variables.md) for details on the parameters.
 - Redis on Ubuntu will now be configured to bind to `0.0.0.0` to ensure accessiblity and to match the other supported OS configurations (@tculp)
-
+- Updated the supported Ansible version to the last two stable releases (currently that's Ansible 2.3 and 2.4) (@jaredledvina)
+  Please note that we have not explicitly broken support for running this role on versions of Ansible <2.3. However, we will only
+  be activly supporting the last two stable Ansible releases to reduce the maintenance burden.
 
 ### Added
 - Initial support for OpenBSD! (@smbambling)