Support gemification of `set`

[casperisfine]

Right now on Ruby 3.0, if you run:

$ gem install set
$ bundle exec some/script/using/set.rb

You'll get the following double load warning:

/opt/rubies/3.0.3/lib/ruby/3.0.0/set.rb:648: warning: already initialized constant Set::InspectKey
~/.gem/ruby/3.0.3/gems/set-1.0.2/lib/set.rb:815: warning: previous definition of InspectKey was here

Based on previous similar issues I suppose set has to be vendored as well? Or PR simply not used anymore (it's mostly a Hash decorator in the end).

[deivid-rodriguez]

I guess yeah. Which rubygems version are you using? According to the test suite, this should've been fixed since rubygems 3.2.6

https://github.com/rubygems/rubygems/blob/a5a1c7f0828ab3c52e75ebbbc88e92a4740b9208/bundler/spec/runtime/setup_spec.rb#L1327

But there may be some situation where set is still loaded internally?

[casperisfine]

$ gem --version
3.2.32

That's the version that ships with a fresh ruby 3.0.3

[casperisfine]

Apologies, after digging a bit more, this is a spring problem. I'll fix it there.

Thank your for such a timely response.

[deivid-rodriguez]

Awesome, no problem! Thanks for your work.