Checks if a round is completed based on its matches.
Parameters
roundMatches: Match[]
Matches of the round.
Returns boolean
Deprecated
This is both functionally and semantically incorrect because:
A match could be completed because of BYEs.
You could totally give a list of matches from different rounds to this function, and it wouldn't complain
although the result will not tell you whether a round is completed.
Please do something like matches.every(m => isMatchCompleted(m)) instead.
Checks if a round is completed based on its matches.