Bump bytestring upper bound to 0.12

Author: jaspervdj

stylish-haskell.cabal

@@ -30,7 +30,7 @@ Common depends
   Build-depends:
     aeson             >= 0.6    && < 2.1,
     base              >= 4.8    && < 5,
-    bytestring        >= 0.9    && < 0.11,
+    bytestring        >= 0.9    && < 0.12,
     Cabal             >= 3.4    && < 3.7,
     containers        >= 0.3    && < 0.7,
     directory         >= 1.2.3  && < 1.4,