[Security] Bump lodash from 4.17.15 to 4.17.20

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.20. **This update includes security fixes.**
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.15...4.17.20

)

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