Doesn't make <br> tags using current version of Editor.js #19

Hi, i appreciate your library. It's a big help for me.
But something goes wrong with using current version of Editor.js(ver 2.27.2).

**Issue**
When I insert line break in table and using save method in Editore.js, There is no
tag in result of save method.
Older version of Editor.js makes `
` tag.
```
const editor = new EditorJS({
tools: {
onChange: function () {
editor.save().then(function (result) {
console.log(JSON.stringify(result));
}
}
}
}
```
**Result**
Current version(ver 2.27.2, as well as New version)

Old version(ver 2.19.3)

Thank you for reading this.