Bump sinatra from `26fa5c8` to `cb4f651`
Bump sinatra from `26fa5c8` to `cb4f651`

Bumps [sinatra](https://github.com/sinatra/sinatra) from `26fa5c8` to `cb4f651`.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Commits](https://github.com/sinatra/sinatra/compare/26fa5c86220890a02cc0f070ddb2696d74a5b843...cb4f651282295803e7484a5841f6285b87e85228)

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