Doc: Add ECS compatibility info and tip (#79)

Bump to v5.1.4

Author: karenzone

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 5.1.4
+  - [DOC] Update filter-jdbc_static doc to describe ECS compatibility [#79](https://github.com/logstash-plugins/logstash-integration-jdbc/pull/79)
+
 ## 5.1.3
   - Improve robustness when handling errors from `sequel` library in jdbc static and streaming
     filters[#78](https://github.com/logstash-plugins/logstash-integration-jdbc/pull/78)

docs/filter-jdbc_static.asciidoc

@@ -264,8 +264,17 @@ order is in place.
 ===============================
 
 
+[id="plugins-{type}s-{plugin}-ecs"]
+==== Compatibility with the Elastic Common Schema (ECS)
+
+This plugin is compatible with the {ecs-ref}[Elastic Common Schema (ECS)]. 
+It behaves the same regardless of ECS compatibility, except giving a warning when ECS is enabled and `target` isn't set.
+
+TIP: Set the `target` option to avoid potential schema conflicts.
+
+
 [id="plugins-{type}s-{plugin}-options"]
-==== Jdbc_static Filter Configuration Options
+==== Jdbc_static filter configuration options
 
 This plugin supports the following configuration options plus the <<plugins-{type}s-{plugin}-common-options>> described later.
 

logstash-integration-jdbc.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = 'logstash-integration-jdbc'
-  s.version         = '5.1.3'
+  s.version         = '5.1.4'
   s.licenses = ['Apache License (2.0)']
   s.summary         = "Integration with JDBC - input and filter plugins"
   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"