Add changelog entry

Author: krassowski

CHANGELOG.md

@@ -16,8 +16,8 @@
     [#129](https://github.com/krassowski/jupyterlab-lsp/pull/129)
     )
   - added a widget panel with diagnostics (inspections), allowing to
-    sort and explore diagnostics, and to go-to the respective location
-    in code (on click); accessible from the context menu (
+    sort and explore diagnostics, and to go to the respective location
+    in code (with a click); accessible from the context menu (
     [#127](https://github.com/krassowski/jupyterlab-lsp/pull/127)
     )
   - all commands are now accessible from the command palette (
@@ -37,6 +37,9 @@
   - fixed LSP of R in Python (`%%R` magic cell from rpy2) (
     [#144](https://github.com/krassowski/jupyterlab-lsp/pull/144)
     )
+  - completion now work properly when the kernel is shut down (
+    [#146](https://github.com/krassowski/jupyterlab-lsp/pull/146)
+    )
 
 ## `lsp-ws-connection 0.3.0`