test java dependency

Author: aguspe

rb/selenium-webdriver.gemspec

@@ -50,6 +50,7 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
 
   s.add_dependency 'base64', ['~> 0.2']
+  s.add_dependency 'json', ['<= 2.13.2'], platform: :java
   s.add_dependency 'logger', ['~> 1.4']
   s.add_dependency 'prism', ['~> 1.0', '< 1.5']
   s.add_dependency 'rexml', ['~> 3.2', '>= 3.2.5']