Do not use autoexporter

Problem: at this moment, we want the package to be located on Hackage,
but it still fails to render documentation for packages using any build
tools, see the
[issue](haskell/hackage-server#821).

Moreover, my HLS fails to build the project because of autoexporter as
well.

Solution: replace uses of `autoexporter` with manually written module
lists.

servant-util-beam-pg/package.yaml

@@ -20,9 +20,6 @@ dependencies:
 library:
   source-dirs: src
 
-  build-tools:
-    - autoexporter
-
 <<: *ghc-options
 
 executables:

servant-util-beam-pg/servant-util-beam-pg.cabal

@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 6ef1c6ee74da17c3ee697b9d46aa6057bc4cb254cc1119be49523b207df91a35
+-- hash: 6dc1197e6121504741430e58f847d8e4248a712c21e73e45b694a5520cfa0e9c
 
 name:           servant-util-beam-pg
 version:        0.1.0.1
@@ -37,8 +37,6 @@ library
       src
   default-extensions: AllowAmbiguousTypes BangPatterns ConstraintKinds DataKinds DefaultSignatures DeriveDataTypeable DeriveGeneric EmptyCase FlexibleContexts FlexibleInstances FunctionalDependencies GADTs GeneralizedNewtypeDeriving LambdaCase MultiParamTypeClasses MultiWayIf NamedFieldPuns NoImplicitPrelude OverloadedStrings OverloadedLabels PatternSynonyms RankNTypes RecordWildCards ScopedTypeVariables StandaloneDeriving TemplateHaskell TupleSections TypeFamilies TypeOperators UndecidableInstances ViewPatterns TypeApplications
   ghc-options: -Wall
-  build-tool-depends:
-      autoexporter:autoexporter
   build-depends:
       base >=4.7 && <5
     , beam-core

servant-util-beam-pg/src/Servant/Util/Beam/Postgres.hs

@@ -1 +1,7 @@
-{-# OPTIONS_GHC -F -pgmF autoexporter -Wno-dodgy-exports -Wno-unused-imports #-}
+module Servant.Util.Beam.Postgres
+  ( module M
+  ) where
+
+import Servant.Util.Beam.Postgres.Filtering as M
+import Servant.Util.Beam.Postgres.Pagination as M
+import Servant.Util.Beam.Postgres.Sorting as M

servant-util/package.yaml

@@ -40,9 +40,6 @@ dependencies:
 library:
   source-dirs: src
 
-  build-tools:
-    - autoexporter
-
 <<: *ghc-options
 
 executables:

servant-util/servant-util.cabal

@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: de73541e9d975e3ed0fdec0ca76af4a65ee45c1ba3e85c9dde8b9b02b103cac4
+-- hash: f8f98d17af973304515c0305889a12f2f94d992dd126b9dbbb5adc8bc7767cdc
 
 name:           servant-util
 version:        0.1.0.1
@@ -75,8 +75,6 @@ library
       src
   default-extensions: AllowAmbiguousTypes BangPatterns ConstraintKinds DataKinds DefaultSignatures DeriveDataTypeable DeriveGeneric EmptyCase FlexibleContexts FlexibleInstances FunctionalDependencies GADTs GeneralizedNewtypeDeriving LambdaCase MultiParamTypeClasses MultiWayIf NamedFieldPuns NoImplicitPrelude OverloadedStrings OverloadedLabels PatternSynonyms RankNTypes RecordWildCards ScopedTypeVariables StandaloneDeriving TemplateHaskell TupleSections TypeFamilies TypeOperators UndecidableInstances ViewPatterns TypeApplications
   ghc-options: -Wall
-  build-tool-depends:
-      autoexporter:autoexporter
   build-depends:
       QuickCheck
     , aeson

servant-util/src/Servant/Util/Combinators.hs

@@ -1 +1,10 @@
-{-# OPTIONS_GHC -F -pgmF autoexporter -Wno-dodgy-exports -Wno-unused-imports #-}
+module Servant.Util.Combinators
+  ( module M
+  ) where
+
+import Servant.Util.Combinators.ErrorResponses as M
+import Servant.Util.Combinators.Filtering as M
+import Servant.Util.Combinators.Logging as M
+import Servant.Util.Combinators.Pagination as M
+import Servant.Util.Combinators.Sorting as M
+import Servant.Util.Combinators.Tag as M

servant-util/src/Servant/Util/Combinators/Filtering/Filters.hs

@@ -1,2 +1,7 @@
 -- | Various filter types.
-{-# OPTIONS_GHC -F -pgmF autoexporter -Wno-dodgy-exports -Wno-unused-imports #-}
+module Servant.Util.Combinators.Filtering.Filters
+  ( module M
+  ) where
+
+import Servant.Util.Combinators.Filtering.Filters.General as M
+import Servant.Util.Combinators.Filtering.Filters.Like as M

servant-util/src/Servant/Util/Common.hs

@@ -1 +1,7 @@
-{-# OPTIONS_GHC -F -pgmF autoexporter -Wno-dodgy-exports -Wno-unused-imports #-}
+module Servant.Util.Common
+  ( module M
+  ) where
+
+import Servant.Util.Common.Common as M
+import Servant.Util.Common.HList as M
+import Servant.Util.Common.PolyKinds as M

servant-util/src/Servant/Util/Dummy.hs

@@ -1,2 +1,9 @@
 -- | Contains dummy backend implementations for introduced combinators.
-{-# OPTIONS_GHC -F -pgmF autoexporter -Wno-dodgy-exports -Wno-unused-imports #-}
+
+module Servant.Util.Dummy
+  ( module M
+  ) where
+
+import Servant.Util.Dummy.Filtering as M
+import Servant.Util.Dummy.Pagination as M
+import Servant.Util.Dummy.Sorting as M