Bump proc-macro-error from 1.0.3 to 1.0.4
Bump proc-macro-error from 1.0.3 to 1.0.4

Bumps [proc-macro-error](https://gitlab.com/CreepySkeleton/proc-macro-error) from 1.0.3 to 1.0.4.
- [Release notes](https://gitlab.com/CreepySkeleton/proc-macro-error/tags)
- [Changelog](https://gitlab.com/CreepySkeleton/proc-macro-error/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/CreepySkeleton/proc-macro-error/compare/v1.0.3...v1.0.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ryanfowler/lines