So I attempted to reinstall this extension and was able to figure out what was happening and why it wouldn't install. I was getting the following error:
Problem 1
- fof/console 0.5.3 requires dragonmantank/cron-expression ^1.2.1 -> satisfiable by dragonmantank/cron-expression[v1.2.1] but these conflict with your requirements or minimum-stability.
- fof/sitemap 0.5.3 requires fof/console ^0.5.3 -> satisfiable by fof/console[0.5.3].
- Installation request for fof/sitemap ^0.5.3 -> satisfiable by fof/sitemap[0.5.3].
Installation failed, reverting ./composer.json to its original content.
What I ended up having to do was removing the dragonmantank extension since my version was saying it was version 3.0. The sitemap extension was requiring version 1.2.1. After removing the dragonmantank extension I was then able to install the sitemap extension and it automatically installed the correct version of dragonman tank.
Everything is working now and thought I was post an update so if anyone else has this issue they know what to do.