Fix wai-app-static without cryptonite

[amesgen]

Fixes a bug introduced in #871.

Without this, I get

hGetBufSome: illegal operation (handle is closed)

with defaultWebAppSettings.

---

• Bumped the version number
• Update the Changelog.md file with a link to your PR
• Check that CI passes (or if it fails, for reasons unrelated to your change, like CI timeouts)

[ysangkok]

Thank you for the patch, sorry I didn't do this correctly. I reproduced the issue with the following patch to sample.hs:

diff --git a/wai-app-static/sample.hs b/wai-app-static/sample.hs
index b9cc2510..c8aa23d7 100644
--- a/wai-app-static/sample.hs
+++ b/wai-app-static/sample.hs
@@ -1,17 +1,21 @@
+{- cabal:
+    build-depends: wai-app-static
+                 , base
+                 , text
+                 , warp
+-}
 {-# LANGUAGE OverloadedStrings #-}
 
 import Data.String
 import Data.Text (pack)
 import Data.Maybe (mapMaybe)
 import WaiAppStatic.Types (ssIndices, toPiece)
-import Network.Wai.Application.Static (staticApp,defaultFileServerSettings)
-import Network.Wai.Handler.Warp (runSettings, settingsPort, defaultSettings)
+import Network.Wai.Application.Static (staticApp,defaultWebAppSettings)
+import Network.Wai.Handler.Warp (runSettings, setPort, defaultSettings)
   
 main :: IO ()
-main = runSettings defaultSettings
-    {
-        settingsPort = 3000
-    } $ staticApp (defaultFileServerSettings $ fromString ".")
+main = runSettings (setPort 3000 defaultSettings)
+    $ staticApp (defaultWebAppSettings $ fromString ".")
     {
       ssIndices = mapMaybe (toPiece . pack) ["index.html"]
     }

This PR does indeed fix the problem.

[snoyberg]

LGTM thanks!