Bumps [bootstrap-sass](https://github.com/twbs/bootstrap-sass) from 3.3.7 to 3.4.1. - [Release notes](https://github.com/twbs/bootstrap-sass/releases) - [Changelog](https://github.com/twbs/bootstrap-sass/blob/master/CHANGELOG.md) - [Commits](https://github.com/twbs/bootstrap-sass/compare/v3.3.7...v3.4.1) Signed-off-by: dependabot[bot] <support@github.com>