Currently, the released packages include all files in the github repository. The release really doesn't need the test related files.
This is easily resolved and controlled by adding a "file" section to package.json. For example:
"files": [
"LICENSE.md",
"README.md",
"dist",
"package.json",
"explainer.md",
"src",
"demo"
],
I can create a PR for this if you like, but it's pretty trivial and maybe faster for one of the devs to just do it as part of the next release.