(GH-80) Update changelog for Keep a Changelog format

This commit updates the changelog to be in line with Keep a Change log format
and adds a missing issue.

CHANGELOG.md

@@ -8,10 +8,16 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 
 ## 0.16.0 - 2018-11-30
 
+### Added
+
 - ([GH-75](https://github.com/lingua-pupuli/puppet-editor-services/issues/75)) Add a node completion item snippet
-- ([GH-34](https://github.com/lingua-pupuli/puppet-editor-services/issues/34)) Autocomplete and hover should retrieve defined types and classes
 - ([GH-68](https://github.com/lingua-pupuli/puppet-editor-services/issues/68)) Language Server should evaluate the locally edited workspace
 
+### Fixed
+
+- ([GH-67](https://github.com/lingua-pupuli/puppet-editor-services/issues/67)) Make resource completion smarter
+- ([GH-34](https://github.com/lingua-pupuli/puppet-editor-services/issues/34)) Autocomplete and hover should retrieve defined types and classes
+
 ## 0.15.1 - 2018-10-30
 
 ### Fixed