logging_library.gemspec in logging_library-1.3.0 vs logging_library.gemspec in logging_library-2.0.0

@@ -1,8 +1,9 @@
 # coding: utf-8
+# frozen_string_literal: true
 
-lib = File.expand_path('../lib', __FILE__)
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'logging_library/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'logging_library'
@@ -19,15 +20,16 @@
     f.match(%r{^(test|spec|features)/})
   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_runtime_dependency 'mixlib-log', '~> 1.7'
   spec.add_runtime_dependency 'rainbow', '>= 2.2'
 
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'rake', '~> 12.3'
   spec.add_development_dependency 'rspec', '~> 3.5'
-  spec.add_development_dependency 'rubocop', '~> 0.50', '< 0.51'
+  spec.add_development_dependency 'rubocop', '~> 0.54'
   spec.add_development_dependency 'yard', '~> 0.9'
 end