Convert yarn commands to npm commandline commands.
e.g. "yarn add bulma node-sass gatsby-plugin-sass" gets converted to: "npm install bulma node-sass gatsby-plugin-sass"
For those times when your only given yarn oriented installation instructions for JavaScript projects and you want to quickly convert them to npm instructions.
Other than the "add" command, "config" and "init" commands are also supported.
For use with yarn 2