chore(deps): update dependency graphql to v2

Author: renovate[bot]

examples/subservice-languages/ruby/Gemfile

@@ -2,7 +2,7 @@
 
 source 'https://rubygems.org'
 
-gem 'graphql', '~> 1.10'
+gem 'graphql', '~> 2.0'
 gem 'graphql-schema_directives', '~> 0.0'
 gem 'rack', '~> 2.0'
 gem 'webrick', '~> 1.9.1'