Why does angular add ng-version attribute to the app-root html tag

Today, I noticed that Angular adds its version information in the app-root as following:

<app-root _nghost-c0="" ng-version="5.2.0">


And even when I build in the production environment, it seems to be present. I don't know what's the main goal for adding that information there ? Isn't it a security issue to show the angular version publicly ? Thanks

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