logstash-output-loggly.gemspec in logstash-output-loggly-4.0.0 vs logstash-output-loggly.gemspec in logstash-output-loggly-5.0.0

@@ -1,8 +1,8 @@
 Gem::Specification.new do |s|
   s.name            = 'logstash-output-loggly'
-  s.version         = '4.0.0'
+  s.version         = '5.0.0'
   s.licenses        = ['Apache License (2.0)']
   s.summary         = "Ships logs to Loggly"
   s.description     = "This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program"
   s.authors         = ["Elastic"]
   s.email           = '[e-mail]'
@@ -21,7 +21,8 @@
   # Gem dependencies
   s.add_runtime_dependency "logstash-core-plugin-api", ">= 1.60", "<= 2.99"
 
   s.add_development_dependency 'logstash-devutils'
   s.add_development_dependency 'logstash-codec-plain'
+  s.add_development_dependency 'rake', '~> 12.2.1' # for JRuby 1.7, Ruby 1.9
 end