Support `aws-cli` version 2

[gotoashishgupta]

aws-cli 2 supports sso login aws configure sso which maintains aws credentials file in a different way which saws currently has issue understanding.

[padrian]

@gotoashishgupta are you still using saws

[devromans]

@gotoashishgupta check https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-completion.html

[huyz]

Project abandoned?