Bump lockfile version

[nmasur]

The Cargo.toml and Cargo.lock are out of sync. This creates an issue when attempting to build the output while locked:

cargo build --locked
    Updating crates.io index
error: the lock file Cargo.lock needs to be updated but --locked was passed to prevent this
If you want to try to generate the lock file without accessing the network, remove the --locked flag and use --offline instead.

Building while locked is important for some tooling, such as packaging with Nix. To fix this, just need to run cargo update -w.

[robenkleene]

Thanks for the PR. To avoid this issue in the future I'll start running cargo update -w when I bump the rep version number (seems like not doing so is what caused the issue here). Also probably a good idea to run it right before publishing a new version, just to make sure there's no difference.

Let me know if there's anything else I should be doing. Cheers!