stack.yaml: Updated to lts-19.16

Last try at this broke on windows with a problem installing ghc, but I
wanted to try again.

Also this has a version of aws that allows using aeson 2.0, which has a
potential security fix.

stack.yaml

@@ -12,19 +12,15 @@ flags:
     gitlfs: true
 packages:
 - '.'
-resolver: lts-18.13
+resolver: lts-19.16
 extra-deps:
 - IfElse-0.85
-- aws-0.22
+- aws-0.22.1
 - bloomfilter-2.0.1.0
 - git-lfs-1.2.0
-- http-client-restricted-0.0.4
+- http-client-restricted-0.0.5
 - network-multicast-0.3.2
 - sandi-0.5
 - torrent-10000.1.1
-- base16-bytestring-0.1.1.7
-- base64-bytestring-1.0.0.3
-- bencode-0.6.1.1
-- http-client-0.7.9
 explicit-setup-deps:
   git-annex: true