Update Rust to 1.37.0

[Jake-Shadle]

Dependabot can't resolve your Rust dependency files.

As a result, Dependabot couldn't update your dependencies.

The error Dependabot encountered was:

error: failed to parse manifest at `/home/dependabot/dependabot-updater/dependabot_tmp_dir/components/client/Cargo.toml`

Caused by:
  the `default-run` manifest key is unstable

Caused by:
  feature `default-run` is required

this Cargo does not support nightly features, but if you
switch to nightly channel you can add
`cargo-features = ["default-run"]` to enable this feature

If you think the above is an error on Dependabot's side please don't hesitate to get in touch - we'll do whatever we can to fix it.

You can mention @dependabot in the comments below to contact the Dependabot team.

We updated to Rust 1.37.0 last week and started using the new default-run feature added to cargo, but dependabot is using an older version of cargo so this breaks upgrading as listed above.

[greysteil]

Sorry about that! I thought a previous change to the Dockerfile would update this, but it looks like updating a comment no longer busts the cache. This change will, though, so this should be fixed today (once it's deployed).

[Jake-Shadle]

Thanks!

[repi]

Verified that it works now for us, thanks!