Add missing language pragma

Author: Ailrun

src/Ide/Plugin/ImportLens.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE ViewPatterns #-}
+{-# LANGUAGE CPP                   #-}
 {-# LANGUAGE DeriveAnyClass        #-}
 {-# LANGUAGE DeriveGeneric         #-}
 {-# LANGUAGE DerivingStrategies    #-}
@@ -8,6 +8,7 @@
 {-# LANGUAGE OverloadedStrings     #-}
 {-# LANGUAGE RecordWildCards       #-}
 {-# LANGUAGE ScopedTypeVariables   #-}
+{-# LANGUAGE ViewPatterns          #-}
 module Ide.Plugin.ImportLens (descriptor) where
 import           Control.Monad                  (forM)
 import           Data.Aeson                     (ToJSON)