tokio command for non blocking sys call

[o2sh]

Following the discussion in #186
Turns out tokio provides a non blocking Command function which returns a Future.

The code is now effectively asynchronous :

get_language_stats --> 2.768313294s
get_configuration --> 21.916µs
get_current_commit_info --> 774.652µs
get_project_license --> 263.539183ms
get_version --> 292.895558ms
get_pending_pending --> 293.050209ms
get_last_change --> 294.630701ms
get_git_info --> 298.447978ms
get_packed_size --> 388.507071ms
get_commits --> 10.346720716s
get_creation_time --> 15.720670077s
get_authors --> 15.944136695s

The code is unfortunately less clean as I had to replace the async block with a separate function get_info_lines in order to mark it with the #[tokio::main], @spenserblack maybe it can be improved ?

[spenserblack]

Looks great! I didn't even know tokio provided an async version of Command 🙃

The code is unfortunately less clean as I had to replace the async block with a separate function

Could Info::new itself be given the #[tokio::main] attribute instead of a new function?

[o2sh]

Could Info::new itself be given the #[tokio::main] attribute instead of a new function?

Done.
By doing so, I add to make the Info::new function async which then allowed me to get rid of the nested async block.

[spenserblack]

🎉