editor.js [Bug] Order of events is wrong for paste

onChange event is fired before pasted content becomes visible through editor.save().

Steps to reproduce:

Create an editor.onChange handler that prints the results of await editor.save()
Paste multiple paragraphs into the editor
Notice how the last paragraph is missing from the saved state

Expected behavior:

All paragraphs are present.

Screenshots:

N/A

Device, Browser, OS:

N/A

Editor.js version: next from GitHub but the bug is also present in the current live demo page

Plugins you use with their versions:

Default plugins from example-dev.html

Here's what's happening:

When content is pasted, handlePasteEvent is called in the Paste component.
This in turn calls processText
Since multiple paragraphs are inserted, they are mapped to insertBlock calls
1. Each one calls paste in the BlockManager
2. paste first calls insert on the BlockManager a. At this point an empty block is created and inserted into DOM b. blockDidMutated is triggered c. This in turn leads to the onChange handler being called d. Since the block is still empty, the Paragraph tool returns nothing from its data getter
3. paste then invokes block.call(BlockToolAPI.ON_PASTE, pasteEvent) a. This sets proper data on the newly inserted paragraph b. blockDidMutated is not retriggered so onChange signal is not invoked

I think it would be cleaner if tool's onPaste was called before calling BlockManager.insert and if it returned the initial data to pass to BlockManager.insert.