Bump symfony/polyfill-iconv from 1.27.0 to 1.30.0

Bumps [symfony/polyfill-iconv](https://github.com/symfony/polyfill-iconv) from 1.27.0 to 1.30.0.
- [Commits](symfony/polyfill-iconv@v1.27.0...v1.30.0)

---
updated-dependencies:
- dependency-name: symfony/polyfill-iconv
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]