Use environmental TMPDIR for lockfile, and add 'rss' as dependency.

[jubishop]

Basic premise here is that some systems (including the one I'm using) don't allow writes to /tmp. And any standard system should be using the TMPDIR env var to identify where you can actually write to tmp, however this still falls back to /tmp in the cases where the var simply doesn't exist, which should make it a non-breaking change for current users.

Also for whatever reason on all my systems I can't bundle it unless I add the gem rss...I'm using Ruby 3.0.

[NobodysNightmare]

Also for whatever reason on all my systems I can't bundle it unless I add the gem rss...I'm using Ruby 3.0.

Using Ruby 3 is the culprit for that. As you can see here: https://stdgems.org/rss/

Before 3.0 this was a default gem (i.e. nothing needed to require it), since then it is only bundled (i.e. you have to install it separately)

[sonots]

lgtm