Update geval

Data/Diff.hs

@@ -60,6 +60,10 @@ current :: Diff a -> a
 current (OneThing u) = u
 current (TwoThings _ new) = new
 
+older :: Diff a -> a
+older (OneThing u) = u
+older (TwoThings old _) = old
+
 class Diffable t where
   type DiffSettings t
   type DiffResult t

gonito.cabal

@@ -130,7 +130,7 @@ library
                  , filemanip
                  , cryptohash
                  , markdown
-                 , geval >= 1.37.2 && < 1.38
+                 , geval >= 1.37.2 && < 1.39
                  , filepath
                  , yesod-table
                  , regex-tdfa