fix: Hide ambiguous instance for (!?)

base 4.19.0.0 introduces Data.List.!? which clashes with Data.Vector.!?, the latter of which is needed for vector operations.

Author: Vekhir

hledger-ui/Hledger/UI/AccountsScreen.hs

@@ -1,5 +1,6 @@
 -- The accounts screen, showing accounts and balances like the CLI balance command.
 
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE TupleSections #-}
@@ -23,7 +24,11 @@ import Brick.Widgets.List
 import Brick.Widgets.Edit
 import Control.Monad
 import Control.Monad.IO.Class (liftIO)
+#if MIN_VERSION_base(4,19,0)
+import Data.List hiding (reverse, (!?))
+#else
 import Data.List hiding (reverse)
+#endif
 import Data.Maybe
 import qualified Data.Text as T
 import Data.Time.Calendar (Day)

hledger-ui/Hledger/UI/RegisterScreen.hs

@@ -19,7 +19,11 @@ where
 import Control.Monad
 import Control.Monad.IO.Class (liftIO)
 import Data.Bifunctor (bimap, Bifunctor (second))
+#if MIN_VERSION_base(4,19,0)
+import Data.List hiding ((!?))
+#else
 import Data.List
+#endif
 import Data.Maybe
 import qualified Data.Text as T
 import qualified Data.Vector as V