Move streaming data into its own file

src/StreamingHelp.hs

@@ -1,15 +1,15 @@
 module StreamingHelp 
     ( minStreamOn
     , sortStreamOn
-    , StreamOf
     , module Streaming
+    , module StreamingHelp.Data
     ) where
 import Streaming
+import StreamingHelp.Data
 import qualified Streaming.Prelude as S
 import qualified Control.Foldl as L
 import Data.Function (on)
 
-type StreamOf a = Stream (Of a) Identity ()
 
 minStreamOn :: Ord a => (b -> a) -> StreamOf b -> Maybe b
 {-# INLINE minStreamOn #-}