Update gulp-yaml requirement from 2.0.2 to 2.0.3 (#4053)
Update gulp-yaml requirement from 2.0.2 to 2.0.3 (#4053)

Updates the requirements on [gulp-yaml](https://github.com/crissdev/gulp-yaml) to permit the latest version.
- [Release notes](https://github.com/crissdev/gulp-yaml/releases)
- [Changelog](https://github.com/crissdev/gulp-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crissdev/gulp-yaml/commits/2.0.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
syuilo/Misskey,syuilo/Misskey