Bump voku/portable-ascii from 2.0.1 to 2.0.3

Bumps [voku/portable-ascii](https://github.com/voku/portable-ascii) from 2.0.1 to 2.0.3.
- [Changelog](https://github.com/voku/portable-ascii/blob/master/CHANGELOG.md)
- [Commits](voku/portable-ascii@2.0.1...2.0.3)

---
updated-dependencies:
- dependency-name: voku/portable-ascii
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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