Please update twig.js

[Yannick Huard]

Hi there!

The version of twig.js used here (^0.9.5) contains annoying bugs (twigjs/twig.js#386) fixed in more recent versions. Could you please update it or declare it as a peer dependency so that we can use the version we want?

Thanks!

[David Mignot]

I made a small pull request, hoping this would made the change easier & quicker 😇