Update testing script to use cargo
Update testing script to use cargo

Jeff-Hostetler/xrust,exercism/xrust,sacherjj/rust,spazm/xrust,ekse/exercism-rust,ekse/exercism-rust,Jeff-Hostetler/xrust,stevejb71/xrust,spazm/xrust,pminten/xrust,petertseng/exercism-rust,pminten/xrust,medek/xrust,sacherjj/rust,stevejb71/xrust,petertseng/exercism-rust,petertseng/exercism-rust,medek/xrust,exercism/xrust,sacherjj/rust