Update 0.18.0 changelog (#564)

* Update 0.18.0 changelog

* Address review comments

* Address review comments

Author: testforstephen

CHANGELOG.md

@@ -4,6 +4,18 @@ All notable changes to the "vscode-java-debugger" extension will be documented i
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 0.18.0 - 2019-04-16
+### Added
+- Enable "Logical Structure" view for Map and Collection variables. [#227](https://github.com/Microsoft/vscode-java-debug/issues/227).
+- Add the source hyperlinks for the stack traces in the Debug Console output. [#490](https://github.com/Microsoft/vscode-java-debug/issues/490), [#506](https://github.com/Microsoft/vscode-java-debug/issues/506).
+- Automatically add `--enable-preview` to vmArgs when necessary. [#553](https://github.com/Microsoft/vscode-java-debug/issues/553).
+
+### Changed
+- Disable `java.debug.settings.showStaticVariables` by default to not show the static fields.
+
+### Fixed
+- Fix: Debug Console does not support autocomplete when a .class file is open. [#535](https://github.com/Microsoft/vscode-java-debug/issues/535).
+
 ## 0.17.0 - 2019-03-06
 ### Added
 - Popup the exception details via a UI widget when an exception breakpoint is hit. [#522](https://github.com/Microsoft/vscode-java-debug/issues/522).