avoid insertWith' depreaction warning

Switch to Data.Map.Strict everywhere that used it.

There are still lots of lazy maps in git-annex. I think switching these
is safe. The risk is that there might be a map that is used in a way
that relies on the values not being evaluated to WHNF, and switching to
strict might result in bad performance or memory use. So, I have not
switched everything.

Assistant/Alert/Utility.hs

@@ -13,7 +13,7 @@ import Utility.Tense
 
 import qualified Data.Text as T
 import Data.Text (Text)
-import qualified Data.Map as M
+import qualified Data.Map.Strict as M
 
 {- This is as many alerts as it makes sense to display at a time.
  - A display might be smaller, or larger, the point is to not overwhelm the
@@ -121,8 +121,7 @@ mergeAlert i al m = maybe updatePrune updateCombine (alertCombiner al)
 		pruneold l =
 			let (f, rest) = partition (\(_, a) -> isFiller a) l
 			in drop bloat f ++ rest
-	updatePrune = pruneBloat $ M.filterWithKey pruneSame $
-		M.insertWith' const i al m
+	updatePrune = pruneBloat $ M.filterWithKey pruneSame $ M.insert i al m
 	updateCombine combiner = 
 		let combined = M.mapMaybe (combiner al) m
 		in if M.null combined