to/from slash in FS impl

gotfparse/pkg/converter/relativeResolveFs.go

@@ -17,12 +17,12 @@ func newRelativeResolveFs(rootDir string) fs.FS {
 // Open allows relative paths leading outside the FS root.
 func (i relativeResolveFs) Open(name string) (fs.File, error) {
 	fullPath := filepath.Join(i.rootDir, name)
-	return os.Open(fullPath)
+	return os.Open(filepath.FromSlash(fullPath))
 }
 
 // Path subverts the FS concept by allowing clients to get the real path.
 func (i relativeResolveFs) Path() string {
-	return i.rootDir
+	return filepath.ToSlash(i.rootDir)
 }
 
 var _ fs.FS = new(relativeResolveFs)