Update AUTHORS and CHANGELOG

Author: AiOO

AUTHORS

@@ -5,6 +5,7 @@ Contributors include::
 
 Abdeali JK
 Abhijeet Kasurde
+Ahn Ki-Wook
 Alexei Kozlenok
 Anatoly Bubenkoff
 Andreas Zeidler

CHANGELOG.rst

@@ -9,11 +9,16 @@
 * Add ``buffer`` attribute to stdin stub class ``pytest.capture.DontReadFromInput``
   Thanks `@joguSD`_ for the PR.
 
+* Fix ``UnicodeEncodeError`` when string comparison with unicode has failed. (`#1864`_)
+  Thanks `@AiOO`_ for the PR
+
 *
 
 .. _@joguSD: https://github.com/joguSD
+.. _@AiOO: https://github.com/AiOO
 
 .. _#1857: https://github.com/pytest-dev/pytest/issues/1857
+.. _#1864: https://github.com/pytest-dev/pytest/issues/1864
 
 
 3.0.1