Bump version, update changelog

Author: hermansje

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to the `testwhat` project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 4.11.1
+
+- Use Perl RegEx
+
 ## 4.11.0
 
 - Add support for positional argument access (`check_arg(n)`) and `...` element argument access (`..n`)

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: testwhat
 Type: Package
 Title: Easily write submission correctness tests for R exercises
-Version: 4.11.0
+Version: 4.11.1
 Date: 2014-07-31
 Description: This package makes it easy for teachers to test students'
     code submissions for R exercises, e.g., for interactive R courses on DataCamp.