hotfix: empty editor and required field fix when onChange event is triggered

[TunahanTuna]

onChange event was not triggering when the editor was empty.

To solve this problem I changed the newData.blocks.lengthcondition to !newData.blocks.length

If condition is met, newData is made null.

I returned the newData unchanged in cases where this condition is not met.

So now we can trigger the onChange event when the editor is empty.

The newData = nullstatement can also provide control when text input is required.

[melishev]

:tada: This PR is included in version 2.0.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: