Gemfile in xstream-0.0.0 vs Gemfile in xstream-0.1.0

@@ -3,9 +3,10 @@
 source "https://rubygems.org"
 
 gemspec
 
 group :development, :test do
-  gem "rake"
-  gem "rspec", "~> 3.7"
-  gem "rubocop", "0.51.0"
+  gem "rake",              require: false
+  gem "rspec",   "~> 3.7", require: false
+  gem "rubocop", "0.52.0", require: false
+  gem "tjson",   "~> 0.5", require: false
 end