Allow QuickCheck 2.12

ndmitchell · ndmitchell · commit dbdb9caae30b · 2018-01-21T16:04:59.000Z
diff --git a/filepath.cabal b/filepath.cabal
@@ -64,4 +64,4 @@ test-suite filepath-tests
     build-depends:
         filepath,
         base,
-        QuickCheck >= 2.7 && < 2.11
+        QuickCheck >= 2.7 && < 2.12
