Roll rebar version 2.1.0
diff --git a/ebin/rebar.app b/ebin/rebar.app
index d3a50df..e64a51f 100644
--- a/ebin/rebar.app
+++ b/ebin/rebar.app
@@ -3,7 +3,7 @@
 
 {application, rebar,
  [{description, "Rebar: Erlang Build Tool"},
-  {vsn, "2.1.0-pre"},
+  {vsn, "2.1.0"},
   {modules, [ rebar,
               rebar_abnfc_compiler,
               rebar_app_utils,