Merge pull request #4933 from xiang90/m

MAINTAINERS: update maintainers list

MAINTAINERS

@@ -1,4 +1,6 @@
+Anthony Romano <anthony.romano@coreos.com > (@heyitsanthony) pkg:*
 Brandon Philips <brandon.philips@coreos.com> (@philips) pkg:*
+Gyu-Ho Lee <gyu_ho.lee@coreos.com> (@gyuho) pkg:*
 Xiang Li <xiang.li@coreos.com> (@xiang90) pkg:*
 
 Ben Darnell <ben@cockroachlabs.com> (@bdarnell) pkg:github.com/coreos/etcd/raft