Update owners

remove folks not on team anymore, add new folks

Change-Id: Ib5834ecb068b8149b8b8f53373100786d4533ea0
diff --git a/OWNERS b/OWNERS
index f8e1917..5596ce1 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,9 +2,11 @@
 
 # Project owners
 zachoverflow@google.com
-stng@google.com
 apanicke@google.com
+cmanton@google.com
+hsz@google.com
 jpawlowski@google.com
 mylesgw@google.com
-pavlin@google.com
+optedoblivion@google.com
 siyuanh@google.com
+stng@google.com