Add a method for TextNode that can be reset the text for the node.

[Kooooooma]

Just like the title what i said, i think it will be useful!

[paquettg]

What do you mean reset?

Do you mean the original text of the node? How do you see this working?

[Kooooooma]

For example, when the textNode it's val is "aa", and then i want to change it into "bb", so i need a method to do this. Just like i can changed the label attr.

[danae]

Indeed a method to change the text of a node would be useful. Now I have to use a workaround, first deleting all children of the node and then adding a new TextNode as a child.

[paquettg]

added method
da5afae