Change node labels default alignment

[vincent0965]

Modification of the node default position in the settings has no effect

Sigma.js version: 2.3.0
Graphology version: 0.24.1
vue version: 2.6.14

My problem is that when I want to set label for nodes is on the bottom hand side or node inside, and I used to json file save nodes info.

I set defaultLabelAlignment:"bottom" and look at the code,but both its unavail, anything I am doing wrong?
https://github.com/jacomyal/sigma.js/pull/468/files

Is it possible to move the label to others position of the node?