Add changelog for 0.43.0

Signed-off-by: Fred Bricon <[email protected]>

Author: fbricon

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Change Log
 
+
+## 0.43.0 (April 16th, 2019)
+* enhancement - optimize server initialization. See [#869](https://github.com/redhat-developer/vscode-java/pull/869).
+* enhancement - download Java sources lazily for Maven projects. See [#870](https://github.com/redhat-developer/vscode-java/pull/870).
+* enhancement - added `Generate toString()...` source action. See [#873](https://github.com/redhat-developer/vscode-java/pull/873).
+* bug fix - completion cache resets after file recompilation resulting in slow code completion. See [JLS#847](https://github.com/eclipse/eclipse.jdt.ls/issues/847).
+
 ## 0.42.1 (April 1st, 2019)
 * bug fix - fixed java.lang.UnsupportedClassVersionError when trying to run/test standalone code. See [#801](https://github.com/redhat-developer/vscode-java/issues/801).