Gemfile in unicode-emoji-2.0.0 vs Gemfile in unicode-emoji-2.1.0

@@ -1,6 +1,7 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
 gemspec
 
-gem 'minitest'
-gem 'rake'
+gem "minitest"
+gem "rake"
+gem "irb"
\ No newline at end of file