Adds missing 'listDevices' function to CognitoUser class for TypeScript type safety

[mrowles]

This function is missing from the CognitoUser class in index.d.ts which causes issues trying to use it in TS projects.

I've also done this in the Amplify repository.

[itrestian]

Can you make the above changes here: https://github.com/aws/aws-amplify/tree/master/packages/amazon-cognito-identity-js

Note the notice on the front of this repo that we have changed where this repository is hosted.

[mrowles]

Thanks @itrestian. As stated in the comments, I have already made this PR successfully there, so all good on that front :)

However, I did raise it because from what I can see, it is quite a different implementation in the new repository (unless I'm missing something?). It seems to only allow usage with the Auth class rather than maintain the original code i.e., import {CognitoUser} from 'amazon-cognito-identity-js'. I understand that this may be better going forward, but I want to use this repository until I can spend the time migrating it to the new code, thus the very small change I made to continue this support.

Also, the new repository's auth package README still refers to this repository.

Let me know what you think. Thanks again!

[itrestian]

No, that should still work if you install via npm with the version of 2.0.0! We update npm from that repository as well so you should be fine.

[mrowles]

@itrestian Ah, you legend, I completely missed that point. So v2 references the Amplify repo package as opposed to this one, that makes sense. Thanks for the heads up, apologies for the PR time waster!