CHANGE: Update dependencies to latest versions (#126)

- Updated dev dependencies:
  - @types/node: 22.19.11 → 22.19.17
  - eslint-plugin-jest: 29.15.0 → 29.15.2
  - jest: 30.2.0 → 30.3.0
  - prettier: 3.8.1 → 3.8.3
  - ts-jest: 29.4.6 → 29.4.9
  - typescript-eslint: 8.56.1 → 8.59.0

- Kept major versions stable for compatibility:
  - @actions/* packages (avoiding breaking changes to v3/v6/v9)
  - eslint at 9.39.2 (avoiding v10 breaking changes)
  - typescript at 5.9.3 (avoiding v6 breaking changes)
  - @types/node at v22 (avoiding v25 breaking changes)

Build, lint, and all 103 tests verified successfully with 100% coverage.

Author: nikhil-mittal-165