mikoshi.gemspec in mikoshi-0.1.5 vs mikoshi.gemspec in mikoshi-0.2.0

@@ -1,5 +1,6 @@
+# frozen_string_literal: true
 # coding: utf-8
 
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'mikoshi/version'
@@ -20,14 +21,19 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.required_ruby_version = '>= 2.3.0'
+
   spec.add_dependency 'activesupport', '~> 5'
   spec.add_dependency 'aws-sdk', '~> 2'
   spec.add_dependency 'thor'
 
   spec.add_development_dependency 'bundler', '~> 1.14'
+  spec.add_development_dependency 'codecov'
   spec.add_development_dependency 'rake', '~> 10.0'
-  spec.add_development_dependency 'minitest', '~> 5.0'
+  spec.add_development_dependency 'rspec'
+  spec.add_development_dependency 'simplecov'
   spec.add_development_dependency 'unasukecop'
+  spec.add_development_dependency 'pry'
 end