Adds yaml runner conditional for JRuby 9.3 in gemspec

Author: picandocodigo

elasticsearch-api/elasticsearch-api.gemspec

@@ -49,7 +49,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'ansi'
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'elasticsearch'
-  s.add_development_dependency 'elasticsearch-test-runner'
+  s.add_development_dependency 'elasticsearch-test-runner' unless defined?(JRUBY_VERSION) && JRUBY_VERSION <= "9.4"
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'minitest-reporters', '>= 1.6'
   s.add_development_dependency 'mocha'