Bump pywebview from 5.3.2 to 5.4

Bumps [pywebview](https://github.com/r0x0r/pywebview) from 5.3.2 to 5.4.
- [Release notes](https://github.com/r0x0r/pywebview/releases)
- [Changelog](https://github.com/r0x0r/pywebview/blob/master/docs/CHANGELOG.md)
- [Commits](r0x0r/pywebview@5.3.2...5.4)

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

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