[nb5] update more nbextensions to list themselves as 5.x-compatible

src/jupyter_contrib_nbextensions/nbextensions/execute_time/ExecuteTime.yaml

@@ -4,7 +4,7 @@ Description: Display when each cell has been executed and how long it took
 Link: readme.md
 Icon: icon.png
 Main: ExecuteTime.js
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Parameters:
 
 - name: ExecuteTime.display_absolute_timings

src/jupyter_contrib_nbextensions/nbextensions/init_cell/init_cell.yaml

@@ -1,5 +1,5 @@
-Type: IPython Notebook Extension
-Compatibility: 3.x, 4.x
+Type: Jupyter Notebook Extension
+Compatibility: 3.x, 4.x, 5.x
 Name: Initialization cells
 Main: main.js
 Icon: icon.png
@@ -11,6 +11,7 @@ Description: |
 Parameters:
 - name: init_cell.run_on_kernel_ready
   description: |
-    Run input cells whenever a kernel_ready.Kernel event is fired. See readme for further details.
+    Run input cells whenever a kernel_ready.Kernel event is fired. See readme
+    for further details.
   input_type: checkbox
   default: true

src/jupyter_contrib_nbextensions/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml

@@ -1,5 +1,5 @@
 Type: IPython Notebook Extension
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Name: Keyboard shortcut editor
 Main: main.js
 Icon: icon.png

src/jupyter_contrib_nbextensions/nbextensions/ruler/ruler.yaml

@@ -4,7 +4,7 @@ Description: This extension enables the Ruler CodeMirror feature
 Link: readme.md
 Icon: icon.png
 Main: main.js
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Parameters:
 - name: ruler_column
   input_type: list