minor update of CREDITS-2.x

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -9,9 +9,13 @@ Authors:
   Tatu Saloranta/@cowtowncoder ([email protected]) : co-author
 
   Drew Stephens/@dinomite ([email protected]) co-author (since 2.11)
+  Vyacheslav Artemyev (@viartemev) co-author (since 2.11)
 
 Contributors:
 
+Hideaki Tanabe (tanabe@github)
+* Brought README.md into the modern world of Gradle (compile -> implementation)
+
 Hidde Wieringa (hiddewie@github)
 * Contributed test case for issue 308
 * Contributed Kotlin DSL constructor