Rakefile in ruby-vpi-12.0.2 vs Rakefile in ruby-vpi-12.1.0

@@ -217,12 +217,14 @@
   s.summary = PROJECT_SUMMARY
   s.description = PROJECT_DETAIL
   s.homepage = PROJECT_URL
   s.version = PROJECT_VERSION
 
-  s.add_dependency 'rspec', '>= 0.5.4'
   s.add_dependency 'rake', '>= 0.7.0'
+  s.add_dependency 'rspec', '>= 0.7.0'
   s.add_dependency 'rcov', '>= 0.7.0'
+  s.add_dependency 'xx' # needed by rcov
+  s.add_dependency 'ruby-debug', '>= 0.5.2'
 
   s.requirements << "POSIX threads library"
   s.requirements << "C language compiler"
 
   s.files = FileList['**/*'].exclude('_darcs')