Merge pull request #70 from phadej/aeson-1.2.2.0

Fix test-suite compilation against aeson-1.2.2.0

Author: phadej

test/Servant/SwaggerSpec.hs

@@ -7,7 +7,7 @@
 module Servant.SwaggerSpec where
 
 import           Control.Lens
-import           Data.Aeson
+import           Data.Aeson       (ToJSON(toJSON), Value, genericToJSON)
 import           Data.Aeson.QQ
 import qualified Data.Aeson.Types as JSON
 import           Data.Char        (toLower)