No need to exclude aws-sdk by default

[skilledDeveloper]

Since aws-sdk has recently supported browserify, it might be the time to stop excluding it in this plugin.
More info: aws/aws-sdk-js#696

[goncaloneves]

@skilledDeveloper Thanks for bringing this.

From what I read Browserify support is to require individual modules like require('aws-sdk/clients/s3') if you want to use the latest sdk version and not the lambda one.
If this is so, it will depend on the setup and preference. Not having it as default, would require to always setting it up globally and probably this is the majority use case.

Right now we could remove aws-sdk from exclude by setting globally in custom or if we use the functions exclude:

custom:
  optimize:
    exclude: []