Change a few Safe to Trustworthy

Our hand is forced by directory:

src/System/Path/Internal.hs:74:1: error: [GHC-44360]
    System.Directory: Can't be safely imported!
    The module itself isn't safe.
   |
74 | import qualified System.Directory            as Dir
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/System/Path/IO/ByteString.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE Safe #-}
+{-# LANGUAGE Trustworthy #-}
 -- | Wrappers around "Data.ByteString"
 module System.Path.IO.ByteString
   (

src/System/Path/IO/Handle.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP  #-}
-{-# LANGUAGE Safe #-}
+{-# LANGUAGE Trustworthy #-}
 module System.Path.IO.Handle
   (
     -- * Wrappers around "System.IO"

src/System/Path/Internal.hs

@@ -1,7 +1,7 @@
 {-# LANGUAGE DefaultSignatures         #-}
 {-# LANGUAGE DeriveDataTypeable        #-}
 {-# LANGUAGE ExistentialQuantification #-}
-{-# LANGUAGE Safe                      #-}
+{-# LANGUAGE Trustworthy               #-}
 {-# LANGUAGE ScopedTypeVariables       #-}
 
 module System.Path.Internal (

src/System/Path/Internal/Compat.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP  #-}
-{-# LANGUAGE Safe #-}
+{-# LANGUAGE Trustworthy #-}
 
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
 

src/System/Path/QQ.hs

@@ -1,7 +1,7 @@
 {-# LANGUAGE CPP                   #-}
 
-#if __GLASGOW_HASKELL__ >= 802
-{-# LANGUAGE Safe                  #-}
+#if (__GLASGOW_HASKELL__ >= 802) && ( __GLASGOW_HASKELL__ >= 806)
+{-# LANGUAGE Safe           #-}
 #else
 {-# LANGUAGE Trustworthy           #-}
 #endif