Update LuaFileSystem to 1.8.0

NiLuJe · Frenzie · commit bfa34a0fb676 · 2020-06-11T22:14:26.000+02:00
(Granted, we don't care much about the changes: Lua 5.4 support, and
win32 support).
diff --git a/luafilesystem b/luafilesystem
@@ -1 +1 @@
-Subproject commit 1dfb8c41e8a7e689959baeaf2961437db9615f74
+Subproject commit 7c6e1b013caec0602ca4796df3b1d7253a2dd258
