Prepare for 2.0.4 release

Prepare for 2.0.3 release

Add support for account aliases identity claim

Merge pull request #23 from hull/feature/unalias-support

Add support for Firehose unalias event

prepare for 1.2.3 release

Merge pull request #22 from hull/release/v2.0.1

Fix flow types

Merge pull request #17 from hull/release/v2.0.0

Release/v2.0.0

Lint

Release 2.0.0-beta.1

Prepare for release 1.2.2