v6.16.0
- Node v16 support - Now supports `--env2json`, `--json2env` as well. - Don't use npx in our tests anymore, it doesn't do what we want just causes problems, such as prompting for installs and messing with output. - Updated dependencies, [base files](https://github.com/bevry/base), and [editions](https://editions.bevry.me) using [boundation](https://github.com/bevry/boundation)