nanoc.gemspec in nanoc-4.7.8 vs nanoc.gemspec in nanoc-4.7.9

- old
+ new

@@ -20,10 +20,10 @@
   s.require_paths      = ['lib']
 
   s.rdoc_options     = ['--main', 'README.md']
   s.extra_rdoc_files = ['LICENSE', 'README.md', 'NEWS.md']
 
-  s.required_ruby_version = '>= 2.1.0'
+  s.required_ruby_version = '>= 2.3.0'
 
   s.add_runtime_dependency('cri', '~> 2.8')
   s.add_runtime_dependency('hamster', '~> 3.0')
   s.add_runtime_dependency('ref', '~> 2.0')
   s.add_runtime_dependency('ddplugin', '~> 1.0')