team_prospects() scrapes the prospects for a given set of team and
position.
Arguments
- team
integer ID (e.g., 21), character full name (e.g., 'Colorado Avalanche'), OR three-letter code (e.g., 'COL'); see
teams()for reference; ID is preferable as there now exists duplicate three-letter codes (i.e., 'UTA' for 'Utah Hockey Club' and 'Utah Mammoth')- position
character of 'f'/'forwards', 'd'/'defensemen', or 'g'/'goalies'
