update changelog

Author: UrielCh

.travis.yml

@@ -1,5 +1,6 @@
 language: java
 jdk:
+  - oraclejdk11
   - oraclejdk8
   - oraclejdk7
 

README.md

@@ -24,6 +24,9 @@ So I do not use my json-smart anymore. I had fun with this project. If you want
 
 # Changelog
 
+### *V 2.4*
+* java 11 build
+
 ### *V 2.3*
 * Patch 37 [issue 37](http://code.google.com/p/json-smart/issues/detail?id=37)
 * Explicite support of char 127 [issue 18](http://code.google.com/p/json-smart/issues/detail?id=18)