Use AWS SDK Version 3 and Modernise Build

Use AWS SDK Version 3 and Modernise Build #27

v2.4.0

Allow updates to solution stack name when update an environment with different version.

v2.3.0

Add tier option so you can create a 'Worker'

application.deploy(
{
    ...,
    tier: 'Worker'
}

v2.2.0

Add ability to tag Elasticbeanstalk Envrionment

v2.1.0

Put to sleep for 1 second between each application version deletion

v2.0.1

Change HEALTHY_TIMEOUT from 120 (seconds) to 300 (seconds)

v2.0.0

Set minimal node version as 4.4.1 and remove babel-polyfill

v1.5.0

waitForHealthy waits until Health is Green and Status is Ready

v1.4.0

During health check, if the environment is terminated for some reason (e.g. terminated manually by user), do not wait and throw error immediately.

v1.3.0

Remove 'use strict' in pre-compiled code, because es2015 module is in strict mode by default.