declared `--stats` as boolean

diff --git a/bin/uglifyjs2 b/bin/uglifyjs2
index 258ca0e..1b64c2f 100755 (executable)
--- a/bin/uglifyjs2
+++ b/bin/uglifyjs2
@@ -25,6 +25,7 @@ Use a single dash to read input from the standard input.\
 
     .boolean("b")
     .boolean("v")
+    .boolean("stats")
 
     .argv
 ;