CI: add Ruby 3.2, 3.3, and fix builds

[olleolleolle]

Changes

This PR adds Ruby 3.2, 3.3 to test matrix

...and updates actions/checkout to latest release.

...and adds webrick to Gemfile for testing purposes.

...and chooses rack-2.2 for Ruby 3.3.

Test failures fixed

Puma and rack and rackup are running older versions, so they're compatible with older versions of Ruby.

Here, though, we fail: when referring to this code

https://github.com/toland/patron/blob/master/spec/support/config.ru#L129-L145

In 3.3, we fail tests with this:

An error occurred while loading ./spec/header_parser_spec.rb.
Failure/Error: APP = Rack::Builder.new { eval(File.read(File.join(__dir__, 'config.ru'))) }

ArgumentError:
  wrong number of arguments (given 3, expected 1..2)
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:41:in `initialize'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:41:in `new'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:41:in `block in remap'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:28:in `each'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:28:in `map'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:28:in `remap'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/urlmap.rb:23:in `initialize'
# (eval at ./spec/support/test_server.rb:6):129:in `new'
# (eval at ./spec/support/test_server.rb:6):129:in `block in <class:PatronTestServer>'
# ./spec/support/test_server.rb:6:in `eval'
# ./spec/support/test_server.rb:6:in `block in <class:PatronTestServer>'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/builder.rb:71:in `instance_eval'
# ./vendor/bundle/ruby/3.3.0/gems/rack-2.1.4.4/lib/rack/builder.rb:71:in `initialize'
# ./spec/support/test_server.rb:6:in `new'
# ./spec/support/test_server.rb:6:in `<class:PatronTestServer>'
# ./spec/support/test_server.rb:5:in `<top (required)>'
# ./spec/spec_helper.rb:19:in `block in <top (required)>'
# ./spec/spec_helper.rb:19:in `each'
# ./spec/spec_helper.rb:19:in `<top (required)>'
# ./spec/header_parser_spec.rb:1:in `<top (required)>'

Aha, that was match = Regexp.new("^#{Regexp.quote(location).gsub('/', '/+')}(.*)", nil, 'n') in Rack::URLMap!

Solution: make it possible to pick a slightly newer Rack for Ruby 3.3.

[olleolleolle]

👋 @toland Hope this message finds you well!

[julik]

Seen 😆