Merge pull request #5 from launchdarkly/ac/nio4r

Rails 5 support

Author: adamlaunchingdarkly

circle.yml

@@ -1,6 +1,6 @@
 machine:
   environment:
-    RUBIES: "ruby-2.4.1;ruby-2.2.2;jruby-9.0.0.0" 
+    RUBIES: "ruby-2.4.1;ruby-2.2.3;ruby-2.1.7;ruby-2.0.0;ruby-1.9.3;jruby-1.7.22" 
 
 dependencies:
   cache_directories:

ldclient-rb.gemspec

@@ -33,7 +33,12 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "hashdiff", "~> 0.2"
   spec.add_runtime_dependency "ld-celluloid-eventsource", "~> 0.9.0"
   spec.add_runtime_dependency "celluloid", "~> 0.18.0.pre" # transitive dep; specified here for more control
-  spec.add_runtime_dependency "nio4r", "~> 2.0" # for maximum ruby version compatibility.
+
+  if RUBY_VERSION >= '2.2.2'
+    spec.add_runtime_dependency "nio4r", "< 3" # for maximum ruby version compatibility.
+  else
+    spec.add_runtime_dependency "nio4r", "~> 1.1" # for maximum ruby version compatibility.
+  end
 
   spec.add_runtime_dependency "waitutil", "0.2"
 end