Fix step behavior for beginless ranges in Ruby 3.4+

See ruby/ruby#7444

Author: kojix2

spec/pycall/pyobject_wrapper_spec.rb

@@ -162,7 +162,10 @@ module PyCall
           expect(list[(1..-1).step(2)]).to eq(PyCall::List.new([2, 4, 6, 8, 10]))
           expect(list[(1..-2).step(2)]).to eq(PyCall::List.new([2, 4, 6, 8]))
           expect(list[(-1..0).step(-1)]).to eq(PyCall::List.new([*1..10].reverse))
-          expect(list[(nil..nil).step(-1)]).to eq(PyCall::List.new([*1..10].reverse))
+          # In Ruby 3.4+, step for non-numeric beginless ranges raises ArgumentError
+          if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('3.4.0')
+            expect(list[(nil..nil).step(-1)]).to eq(PyCall::List.new([*1..10].reverse))
+          end
           expect(list[(-1...0).step(-1)]).to eq(PyCall::List.new([*2..10].reverse))
           expect(list[(-2..2).step(-2)]).to eq(PyCall::List.new([9, 7, 5, 3]))
           expect(list[(-2...2).step(-2)]).to eq(PyCall::List.new([9, 7, 5]))