yesod-test: Fix deprecation warnings

yesod-test/Yesod/Test.hs

@@ -95,8 +95,7 @@ module Yesod.Test
     , withResponse
     ) where
 
-import qualified Test.Hspec as Hspec
-import qualified Test.Hspec.Core as Hspec
+import qualified Test.Hspec.Core.Spec as Hspec
 import qualified Data.List as DL
 import qualified Data.ByteString.Char8 as BS8
 import Data.ByteString (ByteString)

yesod-test/yesod-test.cabal

@@ -23,7 +23,7 @@ library
                    , network                   >= 2.2
                    , http-types                >= 0.7
                    , HUnit                     >= 1.2
-                   , hspec                     >= 1.12.4
+                   , hspec-core                == 2.*
                    , bytestring                >= 0.9
                    , case-insensitive          >= 0.2
                    , text