Update CHANGELOG for new tests

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

CHANGELOG.rst

@@ -4,7 +4,8 @@ Changelog
 2020-01-27  publicsuffix2 2.20200127
 
     * Update TLD list
-    * Include tests in source distribution to help with Debian packaging by kitterma
+    * Include tests in source distribution to help with Debian packaging by @kitterma
+    * Update unicode/idna tests by @hiratara 
 
 
 2019-12-19   publicsuffix2 2.20191219