upgrade to hasql-1.6, hasql-pool-0.8.0.2

- hasql-pool-0.8
  * 'release' now flushes the pool, and no longer destroys it;
    'PoolIsReleasedUsageError' is gone compared to our fork
  * now supports an acquisition timeout, which we don't use
    yet
  * lower bound on 0.8.0.2 to fix a Windows build issue
- hasql-1.6
  introduces a position parameter to ServerError, which we
  ignore

test/spec/Main.hs

@@ -64,7 +64,7 @@ import qualified Feature.RpcPreRequestGucsSpec
 
 main :: IO ()
 main = do
-  pool <- P.acquire 3 $ toUtf8 $ configDbUri testCfg
+  pool <- P.acquire 3 Nothing $ toUtf8 $ configDbUri testCfg
 
   actualPgVersion <- either (panic . show) id <$> P.use pool queryPgVersion
 

test/spec/QueryCost.hs

@@ -24,7 +24,7 @@ import Test.Hspec
 
 main :: IO ()
 main = do
-  pool <- P.acquire 3 "postgresql://"
+  pool <- P.acquire 3 Nothing "postgresql://"
 
   hspec $ describe "QueryCost" $
     context "call proc query" $ do