Bump graphql_schema version.

Author: cocoahero

graphql_java_gen.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.1.0"
 
-  spec.add_dependency "graphql_schema", "~> 0.1.1"
+  spec.add_dependency "graphql_schema", "~> 0.1.8"
 
   spec.add_development_dependency "bundler", "~> 2.1"
   spec.add_development_dependency "rake", "~> 12.0"