Bump self_cell from 1.0.3 to 1.0.4
Bumps [self_cell](https://github.com/Voultapher/self_cell) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/Voultapher/self_cell/releases)
- [Commits](https://github.com/Voultapher/self_cell/compare/v1.0.3...v1.0.4)
---
updated-dependencies:
- dependency-name: self_cell
dependency-type: direct:production
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>