v0.12.0.md in rubocop-minitest-0.20.0

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+ new

@@ -2,9 +2,9 @@
 
 * [#124](https://github.com/rubocop/rubocop-minitest/pull/124): Add new `Minitest/NoAssertions` cop. ([@ghiculescu][])
 
 ### Changes
 
-* [#129](https://github.com/rubocop/rubocop-minitest/pull/129): Drop Ruby 2.4 support. ([@koic][])
+* [#129](https://github.com/rubocop/rubocop-minitest/pull/129): **(Compatibility)** Drop Ruby 2.4 support. ([@koic][])
 
 [@ghiculescu]: https://github.com/ghiculescu
 [@koic]: https://github.com/koic