Replace deprecated configFormatter with configFormat

Author: kazk

test/Main.hs

@@ -2,8 +2,9 @@ module Main (main) where
 
 import Test.Hspec.Runner
 import Test.Hspec.Formatters.Codewars (codewars)
+import Test.Hspec.Core.Formatters.V1 (formatterToFormat)
 
 import qualified Spec
 
 main :: IO ()
-main = hspecWith defaultConfig {configFormatter = Just codewars} Spec.spec
+main = hspecWith defaultConfig {configFormat = Just $ formatterToFormat codewars} Spec.spec