differential.gemspec in differential-1.0.6 vs differential.gemspec in differential-1.1.0

@@ -19,11 +19,13 @@
   s.test_files  = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.homepage    = 'https://github.com/bluemarblepayroll/differential'
   s.license     = 'MIT'
 
-  s.required_ruby_version = '>= 2.3.1'
+  s.required_ruby_version = '>= 2.3.8'
 
   s.add_development_dependency('guard-rspec', '~>4.7')
   s.add_development_dependency('rspec', '~> 3.8')
-  s.add_development_dependency('rubocop', '~> 0.59')
+  s.add_development_dependency('rubocop', '~>0.63.1')
+  s.add_development_dependency('simplecov', '~>0.16.1')
+  s.add_development_dependency('simplecov-console', '~>0.4.2')
 end