As for now [turnout.gemspec](https://github.com/biola/turnout/blob/master/turnout.gemspec) contains the following Rack dependency: ```ruby s.add_dependency('rack', '>= 1.3', '< 3') ``` However, according to Snyk, Rack version 2.* has known security vulnerabilities, such as [Web Cache Poisoning](https://security.snyk.io/vuln/SNYK-RUBY-RACK-1061917). Is it possible to update this Rack dependency to use version 3.0 and above?