Support Ractor#value (#157)

This is same as ruby/stringio#134

---------

Co-authored-by: Koichi Sasada <[email protected]>

Author: hsbt

test/strscan/test_ractor.rb

@@ -8,6 +8,10 @@ def setup
 
   def test_ractor
     assert_in_out_err([], <<-"end;", ["stra", " ", "strb", " ", "strc"], [])
+      class Ractor
+        alias value take unless method_defined? :value # compat with Ruby 3.4 and olders
+      end
+
       require "strscan"
       $VERBOSE = nil
       r = Ractor.new do
@@ -22,7 +26,7 @@ def test_ractor
           s.scan(/\\w+/)
         ]
       end
-      puts r.take.compact
+      puts r.value.compact
     end;
   end
 end