From Melvor Idle
This page is up to date (v1.2.2).

New method of doing version checks that only requires a single update to handle things. Syntax is simply {{V|0.17.0}} or similar. To change the most recent version, just edit the template.

Calling the template without an argument as {{V}} will automatically fill in the auto version (as defined in Template:AutoVersion). The template should only be used without arguments on pages that are automatically populated with data via Lua.