Proper use in a NPM package?

Thanks for the excellent contribution.

I have applied the commons clause license headers to my Github project. However, I need something to put into my `package.json` to ensure the project is adequately protected. Unfortunately, NPM validates this against [the SPDX License List](https://spdx.org/licenses/). Being forced to choose from this list, I chose the underlying license type used by my project. I also added a note to the description to clarify the commons clause addendum.

Do you have any other recommendations how to proceed?