doc/text/news.md in test-unit-rails-6.1.0 vs doc/text/news.md in test-unit-rails-7.0.0

@@ -1,6 +1,21 @@
 # News
 
+## 7.0.0 - 2021-12-20 {#version-7-0-0}
+
+### Improvements
+
+  * Dropped support for Rails 5.1.
+
+  * Added support for Rails 7.0.
+
+  * Added support for deep `sub_test_case`.
+    [GitHub#24][Reported by Akira Matsuda]
+
+### Thanks
+
+  * Akira Matsuda
+
 ## 6.1.0 - 2021-01-13 {#version-6-1-0}
 
 ### Improvements
 
   * Added support for Rails 6.1.