Name of the plugin you want updated: StackSpawners
Spigot Link: https://www.spigotmc.org/resources/30-sale-%E2%98%85-stackspawners-%E2%98%85-1-7-1-13-custom-tiers.59965/
Why should we update this plugin: Its nice to have stacking spawners with tiers, example: you want to 3 tier ghast spawners...