fix windows tests

Signed-off-by: Christian Richter <christian@boltares.de>

internal/test/test.go

@@ -77,6 +77,7 @@ func path(filename string) string {
 }
 
 func compare(actual []byte, filename string) error {
+	actual = normalize(actual)
 	if err := update(filename, actual); err != nil {
 		return err
 	}
@@ -85,6 +86,7 @@ func compare(actual []byte, filename string) error {
 	if err != nil {
 		return errors.Wrapf(err, "unable to read testdata %s", filename)
 	}
+	expected = normalize(expected)
 	if !bytes.Equal(expected, actual) {
 		return errors.Errorf("does not match golden file %s\n\nWANT:\n'%s'\n\nGOT:\n'%s'\n", filename, expected, actual)
 	}