Mlb-statsapi

Enh: Add series_status to schedule https://github.com/toddrob99/MLB-StatsAPI/pull/95 (thanks WardBrian)
Fix: Error in schedule method when team score or name are missing https://github.com/toddrob99/MLB-StatsAPI/issues/96

fix: Attribute Error - Function: lookup_team 91

* Add national broadcasts to schedule() result; thanks WardBrian 71
* Add support for sportId to player_stat_data() 87
* Add latest_season() method to look up the latest season for a given sportId
* Default to latest season instead of current calendar year for lookup_player() and lookup_team() 33

fix: MLB changed pitchesThrown to numberOfPitches

fix: box data error if pitcher has 0 pitches