docs: adds CHANGELOG entry for #451

Author: weierophinney

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
-## 3.1.2 - TBD
+## 3.1.2 - 2019-11-21
 
 ### Added
 
@@ -22,7 +22,7 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#451](https://github.com/zendframework/ZendSkeletonApplication/pull/451) provides compatibility on Windows for the script re-instating the composer.lock in the created project.
 
 ## 3.1.1 - 2019-11-15