Bump Polyfill from 5.4.0 to 5.5.2 in /src (#961)

Bumps [Polyfill](https://github.com/SimonCropp/Polyfill) from 5.4.0 to 5.5.2.
- [Commits](SimonCropp/Polyfill@5.4.0...5.5.2)

---
updated-dependencies:
- dependency-name: Polyfill
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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