gemspec test_files

slim down gem, given test_files is not used (rubygems/guides#90)

Author: dpep

meddleware.gemspec

@@ -15,7 +15,6 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 2.7'
 
   s.files       = Dir.glob('lib/**/*')
-  s.test_files  = Dir.glob('spec/**/*_spec.rb')
 
   s.add_development_dependency 'byebug'
   s.add_development_dependency 'codecov'