Bump aeson to 1.3 for tests

Author: jaspervdj

stylish-haskell.cabal

@@ -118,7 +118,7 @@ Test-suite stylish-haskell-tests
     test-framework       >= 0.4 && < 0.9,
     test-framework-hunit >= 0.2 && < 0.4,
     -- Copied from regular dependencies...
-    aeson            >= 0.6    && < 1.3,
+    aeson            >= 0.6    && < 1.4,
     base             >= 4.8    && < 5,
     bytestring       >= 0.9    && < 0.11,
     containers       >= 0.3    && < 0.6,