Add support to execute nextest

[naikaakash]

Cargo supports cargo test and cargo nextest

This commit provides support of cargo nextest the cargo-all-feature.
Users can simply do
cargo nextest-all-features run
to execute all nextest tests.

[frewsxcv]

Rather than have a separate dependency for every single possible cargo subcommand, I would rather we have something like #48.

[naikaakash]

Ack. I agree that such commit will be more desirable than supporting individual command.
Do we know, if there is any ETA for that PR to get merged? (A rough estimate is fine too)