Gist to get the commands to update your dependencies and devDependencies with yarn

get-dependencies-list-yarn.js

const { dependencies, devDependencies } = require('./package.json');

const depKeys = Object.keys(dependencies).join(' ');
const devDepKeys = Object.keys(devDependencies).join(' ');

const depInstall = `yarn add ${depKeys}`;
const devDepInstall = `yarn add -D ${devDepKeys}`;

console.log(depInstall);
console.log('');
console.log(devDepInstall);