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+source 'https://rubygems.org'
+
+ruby '2.7.3'
+
+group :test do
+  gem 'minitest-reporters', '~> 1.4', '>= 1.4.3', require: false
+  gem 'simplecov', '~> 0.21.2', require: false
+  gem 'simplecov_json_formatter', '~> 0.1.3', require: false
+end
+
+group :docs do
+  gem 'redcarpet', '~> 3.5', '>= 3.5.1', require: false
+  gem 'yard', '~> 0.9.26', require: false
+end