grape-swagger.gemspec in grape-swagger-0.26.1 vs grape-swagger.gemspec in grape-swagger-0.27.0

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 $LOAD_PATH.push File.expand_path('../lib', __FILE__)
 require 'grape-swagger/version'
 
 Gem::Specification.new do |s|
   s.name        = 'grape-swagger'