const promiseAllRecursive = require('promise-all-recursive');

const object = {
    number: 42,
    string: 'something',
    promise: Promise.resolve('this could have been from the network'),
    nested: {
      promise: Promise.resolve('...or the filesystem')
    },
    array: [
      1, 2, Promise.resolve(3)
    ],
    deepNested: [
      { anotherPromise: Promise.resolve('sure!') }
    ]
}

promiseAllRecursive(object)
    .then(result => console.log(result));

{
    number: 42,
    string: 'something',
    promise: 'this could have been from the network',
    nested: {
      promise: '...or the filesystem'
    },
    array: [
      1, 2, 3
    ],
    deepNested: [
      { anotherPromise: 'sure!' }
    ]
}