Update cowlib.app

ebin/cowlib.app

@@ -1,6 +1,6 @@
 {application, 'cowlib', [
 	{description, "Support library for manipulating Web protocols."},
-	{vsn, "2.0.0-rc.1"},
+	{vsn, "2.0.0"},
 	{modules, ['cow_base64url','cow_cookie','cow_date','cow_hpack','cow_http','cow_http2','cow_http_hd','cow_http_te','cow_mimetypes','cow_multipart','cow_qs','cow_spdy','cow_sse','cow_uri','cow_ws']},
 	{registered, []},
 	{applications, [kernel,stdlib,crypto]},