Use skylighitng >= 0.3.3.

Author: jgm

pandoc.cabal

@@ -300,7 +300,7 @@ Library
                  tagsoup >= 0.13.7 && < 0.15,
                  base64-bytestring >= 0.1 && < 1.1,
                  zlib >= 0.5 && < 0.7,
-                 skylighting >= 0.3.1 && < 0.4,
+                 skylighting >= 0.3.3 && < 0.4,
                  data-default >= 0.4 && < 0.8,
                  temporary >= 1.1 && < 1.3,
                  blaze-html >= 0.5 && < 0.10,
@@ -531,7 +531,7 @@ Test-Suite test-pandoc
                   filepath >= 1.1 && < 1.5,
                   hslua >= 0.4 && < 0.6,
                   process >= 1.2.3 && < 1.5,
-                  skylighting >= 0.3.1 && < 0.4,
+                  skylighting >= 0.3.3 && < 0.4,
                   temporary >= 1.1 && < 1.3,
                   Diff >= 0.2 && < 0.4,
                   tasty >= 0.11 && < 0.12,