news.md in test-unit-rails-5.1.2

- old
+ new

@@ -1,11 +1,30 @@
 # News
 
-## 5.0.5 - 2016-12-20 {#version-5-0-}
+## 5.1.2 - 2017-07-05 {#version-5-1-2}
 
 ### Improvements
 
+  * Updated document.
+    [GitHub#12][Patch by Haruka Yoshihara]
+
+  * Migrated document markup to Markdown from Textile.
+    [GitHub#13][Patch by Haruka Yoshihara]
+
+  * Supported Rails 5.1.2.
+    [GitHub#14][Reported by naofumi-fujii]
+
+### Thanks
+
+  * Haruka Yoshihara
+
+  * naofumi-fujii
+
+## 5.0.5 - 2016-12-20 {#version-5-0-5}
+
+### Improvements
+
   * Required test-unit-activesupport 1.0.8 or later.
 
 ## 5.0.4 - 2016-12-20 {#version-5-0-4}
 
 ### Fixes
@@ -75,14 +94,14 @@
 
 Bug fixes release.
 
 ### Fixes
 
-  * Used the correct class to be extended for running tests by @Test::Unit@ .
-    @ActiveSupport::TestCase@ is used now but before @Test::Unit::TestCase@ was.
-    @ActiveSupport::TestCase@ (but @TestUnit::TestCase@ ) is inherited
-    by @ActionController::TestCase@ (for controller tests) and
-    @ActionDispatch::IntegrationTest@ (for integration tests).
+  * Used the correct class to be extended for running tests by `Test::Unit` .
+    `ActiveSupport::TestCase` is used now but before `Test::Unit::TestCase` was.
+    `ActiveSupport::TestCase` (but `TestUnit::TestCase` ) is inherited
+    by `ActionController::TestCase` (for controller tests) and
+    `ActionDispatch::IntegrationTest` (for integration tests).
 
 ## 1.0.3 - 2014-09-04 {#version-1-0-3}
 
 ### Improvements
 