set default_codec doc attribute

[skip ci] update gemspec summary

version bump for some docs fixes

bump patch level for doc generation

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

Make sure all the gems were published under jruby

version 3.0.0

dependency logstash-core-plugin-api ~> 1.0

dependency logstash-core >= 2.0.0.beta2 < 3.0.0

dependency logstash-core >= 2.0.0.snapshot < 3.0.0