tee_logger.gemspec in tee_logger-3.1.1 vs tee_logger.gemspec in tee_logger-3.1.2

@@ -7,12 +7,15 @@
   spec.name          = 'tee_logger'
   spec.version       = TeeLogger::VERSION
   spec.authors       = ['k-ta-yamada']
   spec.email         = ['[e-mail]']
 
+  spec.required_ruby_version = '>= 2.0.0'
+
   spec.summary       = 'logging to file and standard output.'
-  spec.description   =
-    'logging to file and standard output. require standard library only.'
+  # rubocop:disable Metrics/LineLength
+  spec.description   = 'logging to file and standard output. require standard library only.'
+  # rubocop:enable Metrics/LineLength
 
   spec.homepage      = 'https://github.com/k-ta-yamada/tee_logger'
   spec.license       = 'MIT'
 
   # rubocop:disable Metrics/LineLength