Merge branch 'develop' into lalten-ruby_2.3_compatibility

Author: kigster

examples/simple_rails_api/Gemfile.lock

@@ -88,7 +88,7 @@ GEM
     nio4r (2.5.2)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
-    puma (4.3.3)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-test (1.1.0)