Interesting. This is not working for me. If I take the regular bonus files I get warnings about missing dependencies in my console. With the npm bonus files, the imports are not working of course.
EDIT:
Got it now. It's working when not using the npm packages at all - I was still importing TweenMax from node_modules. Now I have also the TweenMax-Script in the header.
script: [
{ src: 'gsap/TweenMax.min.js' },
{ src: 'gsap/MorphSVGPlugin.min.js' },
{ src: 'gsap/SplitText.min.js' },
{ src: 'gsap/DrawSVGPlugin.min.js' },
{ src: 'gsap/GSDevTools.min.js' }
]