Bumps [sinatra](https://github.com/sinatra/sinatra) from 1.4.4 to 1.4.8. - [Release notes](https://github.com/sinatra/sinatra/releases) - [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md) - [Commits](https://github.com/sinatra/sinatra/compare/v1.4.4...v1.4.8) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>