[ruby-core:122552] [Ruby Feature#21442] Make tsort to bundled gems

Issue #21442 has been reported by hsbt (Hiroshi SHIBATA). ---------------------------------------- Feature #21442: Make tsort to bundled gems https://bugs.ruby-lang.org/issues/21442 * Author: hsbt (Hiroshi SHIBATA) * Status: Open ---------------------------------------- In last year, I gave up to make `tsort` to bundled gems because `set` depends `tsort`. https://github.com/ruby/set/blob/29a253d2259e8d6d9b313dec8418ec5ed0caab08/li... Fortunately, `set` is now core class. So, there is no library depends on `tsort` in ruby repository. I propose to make `tsort` to bundled gems at the next release(not Ruby 3.5/4.0, for 4.0(?)/4.1) -- https://bugs.ruby-lang.org/