2.1.2

1. fix undefined paid.

2.1.1

1. fix name undefined.

2.1.0

1. Deprecated: paid parameter in addAccount method.
2. Add arkose_token and fix GPT-4.
3. addAccount method add arkose_token parameter.
4. ask method adds more return values to support continue writing.
5. Add some new method.

2.0.4

1. Update V1 API

2.0.3

1. Sync V1 V2 return.
2. Update tests.

2.0.2

1. Bug Fix
2. Doc update

2.0.1

1. Doc update.

2.0.0

1. Update stream mode return.

1.8.0

Update V1 API and change error thrown.

1.7.2

Fix V1 PHP7.4 support.