[haskell-http-client] update readme; improve lens generation; fix dateFormat (#6448)

* point readme links to canonical locations

* use lenses for non-required model fields, instead of traversals

* fix .gitignore generation

* fix dateFormat cli option bug

samples/client/petstore/haskell-http-client/tests-integration/package.yaml

@@ -29,9 +29,12 @@ dependencies:
 - text >=0.11 && <1.3
 - time >=1.5 && <1.9
 - vector >=0.10.9 && <0.13
+- monad-logger >=0.3 && <0.4
+- exceptions >= 0.4
 - case-insensitive
-- swagger-petstore
+- safe-exceptions <0.2
 - microlens
+- swagger-petstore
 tests:
   tests:
     main: Test.hs

samples/client/petstore/haskell-http-client/tests-integration/swagger-petstore-tests-integration.cabal

@@ -40,10 +40,13 @@ test-suite tests
     , text >=0.11 && <1.3
     , time >=1.5 && <1.9
     , vector >=0.10.9 && <0.13
+    , monad-logger >=0.3 && <0.4
+    , exceptions >= 0.4
     , case-insensitive
-    , swagger-petstore
+    , safe-exceptions <0.2
     , microlens
     , swagger-petstore
+    , swagger-petstore
     , bytestring >=0.10.0 && <0.11
     , containers
     , hspec >=1.8

samples/client/petstore/haskell-http-client/tests-integration/tests/Test.hs

@@ -237,7 +237,11 @@ testUserOps mgr config = do
           }
         _users =
           take 8 $
-          drop 1 $ iterate (L.over S.userUsernameT (<> "*") . L.over S.userIdT (+ 1)) _user
+          drop 1 $
+          iterate
+            (L.over (S.userUsernameL . L._Just) (<> "*") .
+             L.over (S.userIdL . L._Just) (+ 1))
+            _user
 
     before (pure _user) $
       it "createUser" $ \user -> do