fix: shutdown should wait for in flight requests

Upgraded warp to 3.4.13 which fixed https://github.com/yesodweb/wai/issues/853
Changed interrupt handling so that instead of killing the main thread, listening sockets are closed which triggers warp graceful shutdown.

stack.yaml

@@ -16,9 +16,12 @@ extra-deps:
   - hasql-notifications-0.2.2.2
   - hasql-pool-1.0.1
   - hasql-transaction-1.1.0.1
+  - http-semantics-0.4.0
+  - http2-5.4.0
   - postgresql-binary-0.13.1.3
   - text-builder-0.6.10
   - text-builder-dev-0.3.10
+  - warp-3.4.13
 
 allow-newer: true
 allow-newer-deps: