upgraded resty-cli to 0.21.

Author: agentzh

util/mirror-tarballs

@@ -605,7 +605,7 @@ mv openresty-redis2-nginx-module-* redis2-nginx-module-$ver || exit 1
 
 #################################
 
-ver=0.21rc2
+ver=0.21
 $root/util/get-tarball "https://github.com/openresty/resty-cli/tarball/v$ver" -O resty-cli-$ver.tar.gz || exit 1
 tar -xzf resty-cli-$ver.tar.gz || exit 1
 mv openresty-resty-cli-* resty-cli-$ver || exit 1