Incorrect ranking for tied scores

[ebeneliason]

The _update_ranks function appears to assign each score a rank corresponding to its index in the (sorted) list of scores. This fails to account for the possibility of tied scores, in which case I believe the ranks should match. I couldn't find positive confirmation of this in the Playdate Scoreboard API reference, but I think this circumstance is one reason that the scores are presented as records with a rank property, rather than as an array.

For example, if the score values for the second and third place players are equal, I'd expect both to have a rank of 2. (There would be no rank 3 in the list, as ranking would proceed with 4 for the 4th place player.)