Hey sinatra contributors,

With sinatra 2.0.3, we now have active_support as a dependency, as introduced with #1442. I didn't dive into the code base yet on why this is necessary, so I wanted to check here first:

1. Was this change intentional?
2. Is there a good alternative to avoid adding a new dependency to the graph? On the first look it seems like we're only using active_support/core_ext/object/try.rb and backports/rails/string

Context: we're using sinatra for the new fastlane.ci project.