Bump sinatra from `8a7da30` to `9057b70`
Bump sinatra from `8a7da30` to `9057b70`

Bumps [sinatra](https://github.com/sinatra/sinatra) from `8a7da30` to `9057b70`.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Commits](https://github.com/sinatra/sinatra/compare/8a7da30a84e6d6e686b8db1e060e43cff3c25b4a...9057b70664787221512a2f751e2e5c73eab3613c)

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