dual-license as License Zero Prosperity & Apache 2.0

[derhuerst]

licensing:

• https://prosperitylicense.com
• https://guide.licensezero.com/#step-by-step
• https://licensezero.com/offers/20e3ea67-5f73-4aa8-943d-079aefdc109b
• https://gist.github.com/derhuerst/0ef31ee82b6300d2cafd03d10dd522f7

package.json#funding:

• https://docs.npmjs.com/configuring-npm/package-json.html#funding
• https://spdx.org/licenses/
• https://blog.licensezero.com/2020/05/09/npm-metadata.html
• https://github.com/npm/cli/blob/83293c4f805d670708bbf7c24a95f517b7b4cc24/lib/utils/funding.js#L12-L44