bump to 4.0.0

Author: jsvd

CHANGELOG.md

@@ -1,6 +1,9 @@
-## 3.4.5
+## 4.0.0
   - Major performance improvements due to reduced locking
 
+## 3.4.5
+  - version yanked due to breaking changes within .patch release cause logstash crashes in < 5.6
+
 ## 3.4.4
   - Update gemspec summary
 

logstash-filter-grok.gemspec

@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-filter-grok'
-  s.version         = '3.4.5'
+  s.version         = '4.0.0'
   s.licenses        = ['Apache License (2.0)']
   s.summary         = "Parses unstructured event data into fields"
   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"
@@ -21,6 +21,7 @@ Gem::Specification.new do |s|
 
   # Gem dependencies
   s.add_runtime_dependency "logstash-core-plugin-api", ">= 1.60", "<= 2.99"
+  s.add_runtime_dependency "logstash-core", ">= 5.6.0"
 
   s.add_runtime_dependency 'jls-grok', '~> 0.11.3'
   s.add_runtime_dependency 'stud', '~> 0.0.22'