Convert lockfile format to v2

[webmaster128]

There is a new lockfile format we can use.

This tool allows migrating v1 lockfiles to v2 lockfiles: https://docs.rs/cargo-lock/4.0.1/cargo_lock/#translate-convert-cargolock-files-between-the-v1-and-v2-formats:

cargo lock translate > Cargo.lock.v2
mv Cargo.lock.v2 Cargo.lock
cargo build # Format and add auto-generated comments