updated readme and changelog for 0.4.2 release

Author: manishobhatia

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.4.2 - 2019-08-09
+### Added
+- Element.Builder.setValue overridden to accept Object Type
+### Removed
+- Match.childScores is dropped to reduce memory footprint.
+### Changed
+- ScoringFunction changed to BiFunction from Function. It takes a List<Score> of childScores as the second input. 
+This allows childScores to be stored in function stack when score is evaluated instead of the heap, and reduces the overall memory footprint of the library  
+
 ## 0.4.1 - 2019-07-03
 ### Fixed
 - Reduced memory footprint by removing tokens not meeting match threshold  

README.md

@@ -118,7 +118,7 @@ The library is pusblished to maven central
 <dependency>
     <groupId>com.intuit.fuzzymatcher</groupId>
     <artifactId>fuzzy-matcher</artifactId>
-    <version>0.4.1</version>
+    <version>0.4.2</version>
 </dependency>
 ```