add -vt flag changes to NEWS
diff --git a/NEWS b/NEWS
index 013848c..9498237 100644
--- a/NEWS
+++ b/NEWS
@@ -80,6 +80,7 @@ v1.3.0:
* due to these changes, updating is strongly encouraged.
v1.3.1:
+* Verbose mode in the tool now prints the extra statistics also during testing, not just encoding or decoding.
* Update the CI pipeline to Debian Bullseye.
* Fix a minor issue with side effects in RLE decoding.
* Explicitly disable `-march=native` for releases.
