Add rust support?

[Airtnp]

https://leetcode.com/discuss/general-discussion/136640/Rust-support/208982

[jdneo]

Rust has been added in the leetcode-cli but the new version has not been released. skygragon/leetcode-cli@2646b67

Will update the cli version when it gets released.

[jdneo]

Resolved in #179.