Challenge Event Updates at program end

[twells46]

Challenge event updates that should occur at the end of a program don't get recorded in the database. I haven't looked into it yet to determine if the events aren't firing at all or if they aren't getting sent properly.

For example, a program like this should obviously complete challenge 19, but will not show up on the leaderboard.

#include <stdio.h>
#include <kipr/wombat.h>

int main()
{
  motor(0, 50);
  motor(3, 50);
  while(!digital(0));
  return 0;
}

The onSetEventValue_ function in src/pages/ChallengeRoot.tsx might be a good place to start.