Add hlint config

Author: tarleb

.hlint.yaml

@@ -0,0 +1,6 @@
+# HLint configuration file
+##########################
+
+- ignore:
+    name: "Use camelCase"
+    within: "Foreign.Lua.Module.System"

src/Foreign/Lua/Module/System.hs

@@ -1,12 +1,10 @@
-{-# LANGUAGE ScopedTypeVariables #-}
 {-|
 Module      : Foreign.Lua.Module.System
 Copyright   : © 2019 Albert Krewinkel
 License     : MIT
 Maintainer  : Albert Krewinkel <albert+hslua@zeitkraut.de>
 Stability   : alpha
-Portability : Requires language extensions ForeignFunctionInterface,
-              OverloadedStrings.
+Portability : Requires GHC 8 or later.
 
 Provide a Lua module containing a selection of @'System'@ functions.
 -}