chore: update npm dependencies

[derogab]

Summary

Refresh npm dependencies and pin the development toolchain so installs are deterministic. The update also declares the Node.js 20 runtime requirement introduced by Redis 6 and bumps the package patch version to 0.7.3.

Changes

• Bump @derogab/llm-proxy from 0.4.2 to 0.4.3.
• Bump @derogab/stt-proxy from 0.3.1 to 0.3.2.
• Bump redis from 5.11.0 to 6.0.0.
• Declare node >=20.0.0 in package metadata for Redis 6 compatibility.
• Pin dev dependency versions for @types/node, @vitest/coverage-v8, typescript, and vitest.
• Bump package metadata from 0.7.2 to 0.7.3.

Test plan

• Run npm run compile.
• Run npm test.

[cubic-dev-ai]

1 issue found across 2 files

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