Map name to base URL for API

Adding in as potentially may allow package to work over a few APIs

football_api_url(api = "football-data.org")

Arguments

api	Name of API. Currently has "football-data.org"

Value

Base url for API

Examples

FootballData:::football_api_url("football-data.org")
#> [1] "https://api.football-data.org/v2/"