v0.6.1: Fix model initialization for Llama 2 and requests for Anthropic

🔴 Bug fixes

• Llama 2 init doesn't use use_auth_token=True by default anymore (#325)
• Anthropic requests include a anthropic_version header (#325)

Both bugs couldn't be reproduced on our end, so we can't guarantee that these bugs are fixed now. #323 and #324 for a follow-up.

⚠️ Backwards incompatibilities

No backwards incompatibilities w.r.t. v0.6.0.

👥 Contributors

@honnibal, @ines, @rmitsch