Use expand_heap in GC.verify_compaction_references

As `double_heap` was deprecated in ruby/ruby@a6dd859

Signed-off-by: Francisco Javier Honduvilla Coto <javierhonduco@gmail.com>

contrib/ruby/test/test_helper.rb

@@ -10,7 +10,14 @@
 if GC.respond_to?(:verify_compaction_references)
   # This method was added in Ruby 3.0.0. Calling it this way asks the GC to
   # move objects around, helping to find object movement bugs.
-  GC.verify_compaction_references(double_heap: true, toward: :empty)
+  if Gem::Version::new(RUBY_VERSION) >= Gem::Version::new("3.2.0")
+    # double_heap is deprecated and expand_heap is the updated argument. This change
+    # was introduced in:
+    # https://github.com/ruby/ruby/commit/a6dd859affc42b667279e513bb94fb75cfb133c1
+    GC.verify_compaction_references(expand_heap: true, toward: :empty)
+  else
+    GC.verify_compaction_references(double_heap: true, toward: :empty)
+  end
 end
 
 class TrilogyTest < Minitest::Test