news.md in grntest-1.5.8

- old
+ new

@@ -1,6 +1,16 @@
 # News
 
+## 1.5.8: 2023-07-21
+
+### Improvements
+
+  * `--random-seed`: Added.
+
+  * xml: Accepted negative elapsed time.
+
+  * Added support for groonga-nginx.
+
 ## 1.5.7: 2023-03-08
 
 ### Improvements
 
   * Added support for `rr`.