Prepare for 4.1.0

Author: rafaelfranca

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 Get upgrade notes from Sprockets 3.x to 4.x at https://github.com/rails/sprockets/blob/master/UPGRADING.md
 
-## Master
+## 4.1.0
 
 - Allow age to be altered in asset:clean rake task.
 - Fix `Sprockets::Server` to return lower-cased response headers to comply with Rack::Lint 3.0. [#744](https://github.com/rails/sprockets/pull/744)

lib/sprockets/version.rb

@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module Sprockets
-  VERSION = "4.0.3"
+  VERSION = "4.1.0"
 end