Improve keymap (#768)

* Improve keymap

* improve

* rename

* Add tests

* Use nightly for testing

* Enable failing test

* Add manual test case

.github/workflows/integration.yaml

@@ -26,6 +26,7 @@ jobs:
     - name: Setup neovim
       uses: rhysd/action-setup-vim@v1
       with:
+        version: nightly
         neovim: true
 
     - name: Setup lua