Gemfile in spotify-12.5.3 vs Gemfile in spotify-12.6.0

@@ -4,5 +4,10 @@
 
 gem 'pry'
 gem 'yard'
 gem 'maruku'
 gem "plaything", "~> 1.1"
+
+platform :rbx do
+  gem "rubysl"
+  gem "racc"
+end