Add CHANGELOG.md entry (& improve robustness of lowercase/uppercase case)

Author: krassowski

CHANGELOG.md

@@ -9,6 +9,12 @@
     [#159](https://github.com/krassowski/jupyterlab-lsp/pull/159)
     )
 
+- bugfixes
+
+  - fixed various small bugs in the completer (
+    [#162](https://github.com/krassowski/jupyterlab-lsp/pull/162)
+    )
+
 ## `lsp-ws-connection 0.3.1`
 
 - added `sendSaved()` method (textDocument/didSave) (

atest/05_Features/Completion.robot

@@ -59,6 +59,7 @@ User Can Select Lowercase After Starting Uppercase
     [Tags]    language:python
     Setup Notebook    Python    Completion.ipynb
     # `from time import Tim<tab>` → `from time import time`
+    Wait Until Fully Initialized
     Enter Cell Editor    5    line=1
     Trigger Completer
     Completer Should Suggest    time