logstash-plugins#75 fixed accidentally reverse-resolving hostnames (l… …ogstash-plugins#76)

logstash-plugins#73 fixed broken version file naming in gemspec Fixes logstash-plugins#74

logstash-plugins#7 Nio Plain Socket Server Fixes logstash-plugins#71

bump patch level for doc generation 

Merge pull request logstash-plugins#62 from logstash-plugins/bump_v4.1.0 Add support for proxy protocol

dependency logstash-core-plugin-api >= 1.60 <= 2.99 

bump 4.0.2 Fixes logstash-plugins#53

3.0.6 Fixes logstash-plugins#55

Make sure all the gems were published under jruby 

version 4.0.0