Update test-unit and test-unit-ruby-core versions in Gemfile

Author: ydah

Gemfile

@@ -5,6 +5,6 @@ group :development do
   gem "rake", "13.3.0"
   gem "rake-compiler", "1.3.0"
   gem "rdoc", "6.5.1.1"
-  gem "test-unit", "3.6.8"
-  gem "test-unit-ruby-core", "1.0.6"
+  gem "test-unit", "3.7.0"
+  gem "test-unit-ruby-core", "1.0.10"
 end