Update to use aws/aws-sdk-js#1123 explicit webpack support.

[simonbuchan]

aws/aws-sdk-js#1123 just merged and published version 2.6.0 adding native webpack support, which means we can simplify our suggested webpack setup.

• Update README.md to use new aws-sdk webpack support.

• Simplify NPM install by making the dependencies direct rather than peer dependencies.

  This is apparently OK for aws-sdk to do, so we should be able to may as well make it nicer
  for the end-user.

• Remove old grunt build and deps.

The webpack setup docs could later be updated to talk about optimising bundle size, essentially, never require('aws-sdk') / import 'aws-sdk', always use aws-sdk/global or aws-sdk/clients/SERVICE:

var AWS = require('aws-sdk');
var S3 = AWS.S3;
// or
import AWS, { S3 } from 'aws-sdk';

AWS.config.region = 'us-west-1';
var s3 = new S3();

should instead be:

var AWS = require('aws-sdk/global');
var S3 = require('aws-sdk/clients/s3');
// or
import AWS from 'aws-sdk/global';
import S3 from 'aws-sdk/clients/s3';

But previous usage would still work as is so long as you update the aws-sdk you build your bundle from so the dist update for this should also update the aws-cognito-sdk.min.js build to be from 2.6.0

[itrestian]

So should we hold off on the merge for now or is it ok?

[simonbuchan]

Sorry, I was still a bit unclear! Just got a reply for the import issue, but that is just for the suggested usage doc update.
Otherwise I think this is good.
The convention I've seen is to have "WIP" in title until the submitter thinks it's ready

[simonbuchan]

@itrestian See edits to description, in particular this will require updating aws-cognito-sdk.min.js for script file users.

[borisirota]

@itrestian Hi, any reason it isn't being merged ?

[itrestian]

No reason! We will merge it but I need to do the things Simon mentioned: build aws-cognito-sdk.min.js from aws-sdk 2.6.0. And check if everything works correctly.

[borisirota]

Great Thanks 👍

[itrestian]

Can you confirm that we can use, modify, copy, and redistribute this PR? Thanks!

[simonbuchan]

You can use, modify, copy, and redistribute this PR.

[simonbuchan]

@itrestian Ping?

[itrestian]

Yes, just started working on this :).

[itrestian]

Hi Simon,

Everything works great for me. I updated aws-cognito-sdk.min.js from aws-sdk v2.6.4 and it seems to be working. I will merge ASAP!

Thanks a lot!

[itrestian]

Merged and updated dist files.