Update bootstrap-vue requirement from 2.0.0-rc.11 to 2.0.0-rc.13 (#4353)
Update bootstrap-vue requirement from 2.0.0-rc.11 to 2.0.0-rc.13 (#4353)

Updates the requirements on [bootstrap-vue](https://github.com/bootstrap-vue/bootstrap-vue) to permit the latest version.
- [Release notes](https://github.com/bootstrap-vue/bootstrap-vue/releases)
- [Changelog](https://github.com/bootstrap-vue/bootstrap-vue/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/bootstrap-vue/bootstrap-vue/compare/v2.0.0-rc.11...v2.0.0-rc.13)

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