set default_codec doc attribute

Author: jsvd

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 5.0.3
+  - Docs: Set the default_codec doc attribute.
+
 ## 5.0.2
   - Update gemspec summary
 

docs/index.asciidoc

@@ -1,5 +1,6 @@
 :plugin: tcp
 :type: output
+:default_codec: json
 
 ///////////////////////////////////////////
 START - GENERATED VARIABLES, DO NOT EDIT!
@@ -141,4 +142,6 @@ For input, sets the field `sslsubject` to that of the client certificate.
 
 
 [id="plugins-{type}s-{plugin}-common-options"]
-include::{include_path}/{type}.asciidoc[]
+include::{include_path}/{type}.asciidoc[]
+
+:default_codec!:

logstash-output-tcp.gemspec

@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-output-tcp'
-  s.version         = '5.0.2'
+  s.version         = '5.0.3'
   s.licenses        = ['Apache License (2.0)']
   s.summary         = "Writes events over a TCP socket"
   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"