Add Nikolay Sverchkov to main authors

Author: eregon

README.md

@@ -181,7 +181,8 @@ Announcements about GraalVM, including TruffleRuby, are made on the
 
 The main authors of TruffleRuby ordered by first contribution are:
 Chris Seaton, Benoit Daloze, Kevin Menard, Petr Chalupa, Brandon Fish, Duncan
-MacGregor, Christian Wirth, Rafael França, Alan Wu, Nicolas Laurent, Carol Chen.
+MacGregor, Christian Wirth, Rafael França, Alan Wu, Nicolas Laurent, Carol Chen,
+Nikolay Sverchkov.
 
 ## Security