Bump urllib3 from 1.26.16 to 1.26.19 in /model-engine

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.16 to 1.26.19.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.19/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.16...1.26.19)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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Author: dependabot[bot]