chore(deps-dev): bump tiktoken from 0.6.0 to 0.7.0

[dependabot[bot]]

Bumps tiktoken from 0.6.0 to 0.7.0.

Changelog

Sourced from tiktoken's changelog.

[v0.7.0]

• Support for gpt-4o
• Performance improvements

Commits

• bfe00ad Bump cibuildwheel
• 9d01e56 Sync codebase
• 1b9faf2 Simplify byte_pair_merge (#255)
• 6defed5 Inline custom mapping function in _byte_pair_merge
• b4c687e Avoid calling byte_pair_encode for existing tokens
• 6e4851a Add finer grained gratitude
• c2960c1 Store tokens in u32 instead of usize
• See full diff in compare view

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