Relax Win32 bounds to support 2.6

changelog.md

 Changelog for the [`directory`][1] package
 ==========================================
 
+## 1.3.1.3 (September 2017)
+
+  * Relax `Win32` version bounds to support 2.6.
+
 ## 1.3.1.2 (September 2017)
 
   * Relax `base` version bounds to support 4.11.

directory.cabal

 name:           directory
-version:        1.3.1.2
+version:        1.3.1.3
 -- NOTE: Don't forget to update ./changelog.md
 license:        BSD3
 license-file:   LICENSE
@@ -59,7 +59,7 @@ Library
         time     >= 1.4 && < 1.9,
         filepath >= 1.3 && < 1.5
     if os(windows)
-        build-depends: Win32 >= 2.2.2 && < 2.6
+        build-depends: Win32 >= 2.2.2 && < 2.7
     else
         build-depends: unix >= 2.5.1 && < 2.8