Missing assetic dependency in composer.json ?

[stefk]

When building the container, this bundle requires classes of the twigjs lib which in turn refer to assetic classes. Considering that the twigjs library doesn't mention assetic in its dependencies (I guess it's only optional) and that this bundle cannot work properly without it, shouldn't assetic be added to this bundle's composer.json ? Anyway something is missing here for an automated installation with composer.