lua libraries, even on mac, almost never come in .dylib form, but rather .so - change love.filesystem.require accordingly

src/modules/filesystem/physfs/wrap_Filesystem.cpp

@@ -304,8 +304,6 @@ namespace physfs
 	{
 #ifdef LOVE_WINDOWS
 		return ".dll";
-#elif defined(LOVE_MACOSX) || defined(LOVE_MACOS)
-		return ".dylib";
 #else
 		return ".so";
 #endif