Merge pull request #569 from splitio/upgrade-jwt

upgraded jwt

Author: chillaq

splitclient-rb.gemspec

@@ -55,7 +55,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'faraday', '>= 1.1', '< 3.0'
   spec.add_runtime_dependency 'faraday-net_http_persistent', '>= 1.0', '< 3.0'
   spec.add_runtime_dependency 'json', '>= 1.8', '< 3.0'
-  spec.add_runtime_dependency 'jwt', '>= 1.0.0', '< 3.0'
+  spec.add_runtime_dependency 'jwt', '>= 3.1'
   spec.add_runtime_dependency 'lru_redux', '~> 1.1'
   spec.add_runtime_dependency 'net-http-persistent', '>= 2.9', '< 5.0'
   spec.add_runtime_dependency 'redis', '>= 4.0.0', '< 6.0'