permalink.gemspec in permalink-2.0.0 vs permalink.gemspec in permalink-2.1.0

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 require "./lib/permalink/version"
 
 Gem::Specification.new do |s|
   s.name        = "permalink"
   s.version     = Permalink::Version::STRING
@@ -8,16 +10,22 @@
   s.email       = ["[e-mail]"]
   s.homepage    = "http://rubygems.org/gems/permalink"
   s.summary     = "Generate permalink attributes on ActiveModel/ActiveRecord"
   s.description = s.summary
   s.license     = "MIT"
+  s.required_ruby_version = Gem::Requirement.new(">= 2.5.0")
 
   s.files         = `git ls-files`.split("\n")
   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.executables   = `git ls-files -- bin/*`
+                    .split("\n")
+                    .map {|f| File.basename(f) }
   s.require_paths = ["lib"]
 
   s.add_dependency "activerecord"
-  s.add_development_dependency "sqlite3"
   s.add_development_dependency "minitest-utils"
   s.add_development_dependency "rake"
+  s.add_development_dependency "rubocop"
+  s.add_development_dependency "rubocop-fnando"
+  s.add_development_dependency "simplecov"
+  s.add_development_dependency "sqlite3"
 end