Bump to v.3.9.4

Author: karenzone

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 3.9.4
+  - [DOC] Add examples for using space delimited strings for `hosts` option [#149](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/149)
+
 ## 3.9.3
   - [DOC] Update links to use shared attributes [#144](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/144)
 

logstash-filter-elasticsearch.gemspec

@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-filter-elasticsearch'
-  s.version         = '3.9.3'
+  s.version         = '3.9.4'
   s.licenses        = ['Apache License (2.0)']
   s.summary         = "Copies fields from previous log events in Elasticsearch to current events "
   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"