Gemfile.rails-edge in workflow-1.2.0

- old
+ new

@@ -1,12 +1,13 @@
 source "http://rubygems.org"
 
 group :development do
+  gem "minitest", "< 5.0.0" # 5.0.0 introduced incompatible changes renaming all the classes
   gem "rdoc", ">= 3.12"
   gem "bundler", ">= 1.0.0"
   gem "activerecord"
   gem "sqlite3"
   gem "mocha"
   gem "rake"
-  gem "ruby-graphviz", ">= 1.0"
+  gem "ruby-graphviz", "~> 1.0.0"
   gem 'protected_attributes'
 end