cargo-modify

Currently a proof of concept for being able to switch the new resolver on/off via a cmd line call during a CI build job.

usage

run cargo modify in a folder that contains a Cargo.toml:

```sh

set new resolver

cargo modify new-resolver

same as above

cargo modify new-resolver --v2=true

remove 'resolver' from Cargo.toml

cargo modify new-resolver --v2=false ```

Caution this will reorder your Cargo.toml arbitrarily. Primary use-case is to do on-the-fly changes on a CI

more

later we could use this to allow arbitrary edits on a Cargo.toml, ideas welcome.