Salt Version Compatibility

Problem:
Please is there a documentation where I can find which version of salt is compatible with the forman-salt-plugins available.

I have a 2015.5.10 Salt master and minion currently running on plugin 1.15 and I’m thinking of upgrading my salt environment to 2017/2018 but I don’t know which plugin is compatible with these higher versions of salt.

Expected outcome:

Foreman and Proxy versions:
Red Hat Satellite (build: 6.3.2)
Version 6.3
foreman-1.15.6.45-1.el7
foreman-proxy-1.15.6.6-1.el7
foreman-proxy-content-3.4.5-18.el7

Foreman and Proxy plugin versions:
foreman_salt-8.0.4-1.fm1_15.el7
smart_proxy_salt-2.1.9-1.el7

Other relevant data:
[e.g. logs from Foreman and/or the Proxy, modified templates, commands issued, etc]

Salt 2018 is compatible with foreman 1.18 and salt_plugin 8, but be sure to test your specific feature set.