cabal: Relax vector dependency. It builds fine with this

Author: nh2

JuicyPixels.cabal

@@ -132,7 +132,7 @@ Library
                  binary              >= 0.8.1     && < 0.9,
                  zlib                >= 0.5.3.1 && < 0.7,
                  transformers        >= 0.2,
-                 vector              >= 0.13,
+                 vector              >= 0.12.3.1,
                  primitive           >= 0.4,
                  deepseq             >= 1.1     && < 1.5,
                  containers          >= 0.4.2   && < 0.7