Update changelog and version

Author: aarondl

CHANGELOG.md

@@ -4,7 +4,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic
 Versioning](http://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [v4.2.0] - 2020-07-03
 
 - Add types.DecimalContext to control the context with which new decimals
   are created. This is important if your application uses a special context

main.go

@@ -18,7 +18,7 @@ import (
 
 //go:generate go-bindata -nometadata -pkg templatebin -o templatebin/bindata.go templates templates/singleton templates_test templates_test/singleton
 
-const sqlBoilerVersion = "4.1.2"
+const sqlBoilerVersion = "4.2.0"
 
 var (
 	flagConfigFile string