Update to Blockly 12

README.md

@@ -134,13 +134,15 @@ scope of its wrapped input function.
 For more information, please check out the following [issue page](https://github.com/mit-cml/workspace-multiselect/issues/50).
 
 ### Note on keyboard navigation plugin
-Currently, the keyboard navigation plugin has no compatibility issues with the multiselect plugin. It is enabled by default
-in the test files. However, one thing that developers and users should note is that the regular Blockly core's copy/cut/paste shortcuts 
-and multiselect plugin's copy/cut/paste shortcuts are completely disabled when the keyboard navigation mode is turned on. This was assumed
-to be the expected behavior of the user as it defeats the purpose of having the keyboard navigation mode turned on and the user would try to
-select blocks using the cursor and copy/cut/paste with that selection. However, if a developer wants to allow for either copy/cut/paste behavior
-(Blockly Core or multiselect plugin) while the keyboard navigation mode is turned on, we would have to make the following changes described in this
-[issue](https://github.com/google/blockly-samples/issues/2424).
+The keyboard navigation plugin must be initialized after the multiselect plugin. Set `multiselectCopyPaste.menu` to `false` to avoid duplicate clipboard context menu items, pass `allowCrossWorkspacePaste: true` to keyboard navigation, and call `onKeyboardNavigationInit()` after:
+
+```javascript
+const multiselectPlugin = new Multiselect(workspace);
+multiselectPlugin.init({multiselectCopyPaste: {menu: false}});
+
+new KeyboardNavigation(workspace, {allowCrossWorkspacePaste: true});
+multiselectPlugin.onKeyboardNavigationInit();
+```
 
 ### Note on disable top blocks plugin
 The disable top blocks plugin has to be initialized after the multiselect plugin. The main reason behind this is that 
@@ -151,6 +153,7 @@ customization. If we install the disable top blocks plugin after the multiselect
 ## API
 
 - `Multiselect.init`: Initialize the plugin.
+- `Multiselect.onKeyboardNavigationInit`: Call after initializing the keyboard navigation plugin.
 - `Multiselect.dispose`: Dispose the plugin.
 - `MultiselectDraggable`: The customized draggable object unique to each workspace that contains the blocks in the multiselection.
 - `dragSelectionWeakMap`: The WeakMap storing set of currently selected block ids by workspace svg.