Merge pull request #89 from bgamari/master

Bump time upper bound

unix.cabal

@@ -64,7 +64,7 @@ library
     build-depends:
         base        >= 4.5     && < 4.11,
         bytestring  >= 0.9.2   && < 0.11,
-        time        >= 1.2     && < 1.8
+        time        >= 1.2     && < 1.9
 
     exposed-modules:
         System.Posix