Update nginx / Lua Module documentation (0.10.13)

lib/docs/scrapers/nginx_lua_module.rb

@@ -2,7 +2,7 @@ module Docs
   class NginxLuaModule < Github
     self.name = 'nginx / Lua Module'
     self.slug = 'nginx_lua_module'
-    self.release = '0.10.11'
+    self.release = '0.10.13'
     self.base_url = "https://github.com/openresty/lua-nginx-module/tree/v#{self.release}/"
 
     html_filters.push 'nginx_lua_module/clean_html', 'nginx_lua_module/entries', 'title'