Add optional dependencies for anthropic and xmltodict

[jpetrantoni]

Fixes #518

When running pip install instructor[anthropic] anthropic and xmltodict are not installed and the following warning is shown WARNING: instructor 0.6.5 does not provide the extra 'anthropic'

1. Adds optional depencencies to pyproject.toml

Ive tested to ensure pip install instructor does not install anthropic and xmltodict unintentionally, as well as pip install instructor[anthropic] to verify there is no issues with install anthropic and xmltodict.

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	🚀 This PR description was created by Ellipsis for commit 32d17e0.

Summary:

This PR modifies 'pyproject.toml' to add 'anthropic' and 'xmltodict' as optional dependencies, ensuring they are not installed unintentionally and are correctly installed with 'pip install instructor[anthropic]'.

Key points:

• Added optional dependencies for 'anthropic' and 'xmltodict' in 'pyproject.toml'.
• Ensured these dependencies are not installed unintentionally with 'pip install instructor'.
• Verified that 'pip install instructor[anthropic]' installs these dependencies without issues.

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Generated with ❤️ by ellipsis.dev

[ellipsis-dev]

👍 Looks good to me!

• Reviewed the entire pull request up to 32d17e0
• Looked at 21 lines of code in 1 files
• Took 25 seconds to review

More info

• Skipped 0 files when reviewing.
• Skipped posting 1 additional comments because they didn't meet confidence threshold of 85%.

1. pyproject.toml:25:

• Assessed confidence : 0%
• Comment:
  The optional dependencies 'anthropic' and 'xmltodict' have been added correctly to the 'tool.poetry.dependencies' and 'tool.poetry.extras' sections. This should allow users to install these dependencies optionally using the command 'pip install instructor[anthropic]'.
• Reasoning:
  The changes in the PR seem to be in line with the intent of the author. The optional dependencies 'anthropic' and 'xmltodict' have been added correctly to the 'tool.poetry.dependencies' section and the 'tool.poetry.extras' section. This should allow users to install these dependencies optionally using the command 'pip install instructor[anthropic]'. There doesn't seem to be any violation of best practices, logical bugs, performance bugs, or security bugs. However, I will check the rest of the codebase to ensure that these changes do not affect other parts of the code.

Workflow ID: wflow_YyChmITHq1Fyt3N0

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