Automatic answer validation

[ajasmin]

Neither cargo solve nor cargo all currently validate a puzzle’s answer after submission.

It’s common to refactor or optimize the solution's code after an answer has been submitted, and it’s helpful to ensure that these changes don’t accidentally alter the result.

This could be automated by re-downloading the puzzle description after submission and checking the “Your puzzle answer was: xxx” line to confirm the answer remains unchanged.

[Lollyde]

i actually implemented something like this for myself here, all i have to do is to replace the advent_of_code::solution!(day) macro with advent_of_code::solution_with_check(day, solution_part1, solution_part2) and it makes sure the results match what they should!
sure, its not fully automatic, but i quite like the ritual of replacing the macro and pasting in the correct results as a little reward when i finish a day