Rakefile in cross-stub-0.1.4 vs Rakefile in cross-stub-0.2.0

@@ -10,12 +10,19 @@
     gem.email = "[e-mail]"
     gem.homepage = "http://github.com/ngty/cross-stub"
     gem.authors = ["NgTzeYang"]
     gem.add_development_dependency "bacon", ">= 0.0.0"
     gem.add_development_dependency "eventmachine", ">= 0.0.0"
-    gem.add_dependency "ParseTree", "= 3.0.4"
     gem.add_dependency "ruby2ruby", "= 1.2.4"
+    gem.add_dependency "ruby_parser", "= 2.0.4"
+    gem.required_ruby_version = '>= 1.8.7'
+    # ##
+    # TODO: How do we declare the following optional dependencies ??
+    # 1. gem.add_dependency "memcache-client", "= 1.8.5"
+    # 2. gem.add_dependency "redis", "= 2.0.3"
+    # ##
     # gem is a Gem::Specification... see http://www.rubygems.org/read/chapter/20 for additional settings
+    #
   end
 rescue LoadError
   puts "Jeweler (or a dependency) not available. Install it with: sudo gem install jeweler"
 end