Update to 2.0.1

• Fix RUN_DEPENDS:
  • Remove unnecessary rubygem-backports
  • Add missing rubygem-mustermann
  • Remove rubygem-rack-test
  • Fix version requirement
• Take maintainership

Changes: https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md

		https://github.com/sinatra/sinatra/commits/master

PR: 226784
Submitted by: sunpoet (myself)
Approved by: feld (maintainer)