Bump dompdf/dompdf from 1.0.2 to 1.1.1 (#2425)

Bumps [dompdf/dompdf](https://github.com/dompdf/dompdf) from 1.0.2 to 1.1.1.
- [Release notes](https://github.com/dompdf/dompdf/releases)
- [Commits](dompdf/dompdf@v1.0.2...v1.1.1)

---
updated-dependencies:
- dependency-name: dompdf/dompdf
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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