Fun fact, it turns out I’ve fixed the update-lockfile strategy as a side effect of “fix Elixir’s special operator in list (#33325)” 
Here’s some context for those who might not know Renovate well enough to get it:
- the
update-lockfilestrategy is about updating a specific dependency inmix.lockif a new version satisfying the range frommix.exsis available lockFileMaintenancewill update all indirect dependencies directly inmix.lock
As an example for lockFileMaintenance, because ash requires decimal ~> 2.0, if your mix.lock had it locked to 2.2.0, it would update the locked version to 2.3.0).
This wasn’t working at all until right now, and I didn’t expect this change (I didn’t even think about it for some reason, but I’m pretty happy I fixed it “by mistake” 
)
Here’s the PR that made me aware of this for reference: “build(deps): update dependency castore to v1.0.11 (#28) · sheerlox/nodelix”
@mruoss that might already be a very good step regarding your needs
(honestly one of my most painful open-source contributions ever)
