Hard-coded '2020' breaks standings simulator for 2021 season

[WrongSandwich]

Not sure if this is still an active project, but the line below is preventing the standings simulator from working with the current fantasy season.

I believe replacing 2020 with new Date().getFullYear() should fix the issue.

fantasy-tools/src/pages/standings/StandingsSimulator.js

Line 48 in cf9ce9f

const fetchRankings = async (leagueId, seasonId = '2020') => {