Version 2.1.4

Refactor: env variable to resemble LS' `LOG_LEVEL` (elastic#87)

it's not exactly the same as LS's `LOG_LEVEL` path can be used the same way e.g. `LOG_LEVEL=debug` will do the same as within normal LS ...

Merge pull request elastic#85 from robbavey/add_events_method

Add `events` method to QueueBatchDelegator

add plain codec dependency for pipeline helpers

Fix: unwrap output and refactor test sink (elastic#82)

the old way wasn't reliable in case of pipeline failures

this is now expected to be more robust at a cost of relying on some of
the native internals (which are available since LS 6.3 - our baseline)

Chore: add gem (publish) tasks (elastic#81)

and the ability to specify logstash-core gem path

add some compatibility for logstash 6.x and ruby 2.x

* make input helper use new_pipeline_from_string
* make return of input helper lambda explicit

Merge pull request elastic#60 from elastic/fix-logging

update devutils to include new log4j2 setup

1.0.1

0.0.22