if we drop the fast-cgi backend, we can as well use more up to date versions

stack.yaml

@@ -19,7 +19,7 @@
 # resolver: https://example.com/snapshots/2018-01-01.yaml
 # would love a newer resolver, but wai-handler-fastcgi forces an old version of
 # wai-extra, this is the newest resolver satisfying that requirement
-resolver: lts-16.16
+resolver: lts-17.8
 #  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/15.yaml
 
 # User packages to be built.
@@ -40,7 +40,6 @@ packages:
 extra-deps:
 - tickLeiste/tickLeiste
 - tickLeiste/tickLeiste-aeson
-- wai-handler-fastcgi-3.0.0.2@sha256:ecf5b5bd7e493b361df9099c190b6ca8f2fb5a467a2a5efa271b7f52d4d82986,1136
 # - acme-missiles-0.3
 # - git: https://github.com/commercialhaskell/stack.git
 #   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a

stack.yaml.lock

@@ -4,16 +4,9 @@
 #   https://docs.haskellstack.org/en/stable/lock_files
 
 snapshots:
-- original: lts-16.16
+- original: lts-17.8
   completed:
-    sha256: d6b004b095fe2a0b8b14fbc30014ee97e58843b9c9362ddb9244273dda62649e
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/16.yaml
-    size: 532380
-packages:
-- original:
-    hackage: wai-handler-fastcgi-3.0.0.2@sha256:ecf5b5bd7e493b361df9099c190b6ca8f2fb5a467a2a5efa271b7f52d4d82986,1136
-  completed:
-    pantry-tree:
-      sha256: d090422c36807ef5838f72fa74efcc211c528c5ba84e5a5114f6a3cf4ec685f4
-      size: 442
-    hackage: wai-handler-fastcgi-3.0.0.2@sha256:ecf5b5bd7e493b361df9099c190b6ca8f2fb5a467a2a5efa271b7f52d4d82986,1136
+    sha256: 76bf8992ff8dfe6eda9c02f81866138c2369344d5011ab39ae403457c4448b03
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/17/8.yaml
+    size: 565720
+packages: []