fflr 1.9.2

• Fix tidy_scores() for settings that award home team points.
• Remove bad variables argument from pro_scores().
• Add vignette and update the README and logo.
• Unnest the currentScoringPeriod in ffl_seasons().
• Remove seasonId argument in sub-functions.
• Use proTeamId and playerId column names in data.
• Clarify which columns are simulated in league_simulation().
• Add overwrite argument to ffl_id() to set options() regardless.
• Rename state_correct() to stat_corrections() and update for new back-end.